Malicious PDF — malware analysis report

Static analysis result for SHA-256 d2cea41baf7e171a…

MALICIOUS

PDF

54.5 KB Created: 2020-08-30 01:22:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 4966a43c85a923c23539d8d57b512f7a SHA-1: b48adfcf5d46e61fd067e09a19e4c18e96d143ce SHA-256: d2cea41baf7e171acfb5a2b83bb0b4f5b53abea8fac097171110d8bb34533e38
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was flagged for containing a malicious redirector link and a large number of embedded links, indicating a link farm. The primary malicious URL identified is https://ttraff.com/wix?keyword=mrua+caida+libre+ejercicios+resueltos. The document body contains garbled text but also includes the same malicious URL and several benign-looking PDF links, suggesting an attempt to disguise malicious activity within a large number of links.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ttraff.com/wix?keyword=mrua+caida+libre+ejercicios+resueltos In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_90377477b0904e5ababda945b3dd6dce.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/136d07_80802f65c4974dc58953cc1c29e571e2.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_c5457d31b2ec4059a31b98aa8781f0d3.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/48d9a1_d85213e8cea04b6da0a3fce61c44d810.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_4e2aacc39c9b4d2cb4a4ad025b9efbc1.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/2576/6312/files/4728770817.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0449/3757/6603/files/welbilt_bread_machine_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0450/4341/7246/files/atul_maheshwari_chatravriti_yojna_2020.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/9357/1224/files/formica_countertop_replacement_cost.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/0049ca_cda32a900b514c5ead5f303cda1e43df.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/7f46b5_0095a46e647b4c089258f647233338d9.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_33e1cc63d4504eafa87113d5abcd29bb.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/a771bd_100861abd2834bb78e4139b74096d880.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/9757e7_7181d769eb56470d8f62c90d89118270.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/0c8cc8_2634caa29317432da463432dc10e6c9a.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/8cbfce_a66f63e84dd7469ea9468dd5886ca48a.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000061cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x61CC 6440 bytes
SHA-256: 3d4760ca295192c89086870ebbac49c5a5945404ea6ab57fca452cf2db5f569a
font_01_sfnt_off000071c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x71C0 5156 bytes
SHA-256: 71ebcb50ff0869271de5685cb2d58c32f0d16e300f9c2b9565a5388728524b07
font_02_sfnt_off0000834d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x834D 3676 bytes
SHA-256: 8557e22890982bcf48a5349cdaae36a85fbaafab5416c10e97c1e14c074d71ef
font_03_sfnt_off00009147.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9147 10736 bytes
SHA-256: 535e8bda0f4b616783cb9a5092453b9db5a200801d50a80c62c3ec4be07c6a40
font_04_sfnt_off0000b46c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB46C 16344 bytes
SHA-256: 9c47a8ecf7103172530608de19fa11afb8a035ab51042e9cb8c6809f09ebb189

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