Malicious PDF — malware analysis report

Static analysis result for SHA-256 c421467a1b6cfa5c…

MALICIOUS

PDF

42.4 KB Created: 2020-08-16 15:46:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 17bff3aab783f15c5130240e3adba407 SHA-1: 552d62cc2d1903683fa42795d95be8604780db15 SHA-256: c421467a1b6cfa5ccfb6779479d2fb4c58a2a25789e791d3b260b7fe443c8368
194 Risk Score

Malware Insights

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

The PDF was flagged as malicious due to a high concentration of embedded links, many of which point to a redirector service. The document body, though heavily obfuscated, contains the URL 'https://ttraff.com/pify?keyword=steel+sheet+metal+gauge+sizes', which is also listed as a malicious redirector. This indicates a likely attempt to lure users to malicious sites through a link farm.

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/pify?keyword=steel+sheet+metal+gauge+sizes In PDF document text
    • http://files.c-questconsultants.com/uploads/1/3/1/6/131637546/25c846c15b25.pdfIn PDF document text
    • http://files.jonastinius.com/uploads/1/3/1/3/131380870/2203791.pdfIn PDF document text
    • http://ferimag.metrowestsoccer.com/uploads/1/3/1/4/131482962/e555888.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1251/4201/files/root_lg_g6.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3795/7023/files/logonukavu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/6539/0757/files/autodesk_3ds_max_2017_tutorial.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/8768/1954/files/rozosuzinufatimizotaze.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9436/7644/files/67111647309.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6375/4404/files/sutotosaladikuf.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3412/3160/files/mixenolosojulatugegifexu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2890/5127/files/kokisa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3075/8054/files/geguragexoviwa.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
    • http://scripts.sil.org/OFLIn PDF document text

Related samples 1

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

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005dd6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5DD6 4824 bytes
SHA-256: c0cc98d5ab8880c33534f1b10fd434c6f8807bd6b3ed91fec2f7851393dbfd12
font_01_sfnt_off00006e3e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6E3E 9576 bytes
SHA-256: d1f9e66739ad0fc62ca5c4225bbd720dea27d762487f3defa26deebfa8df99ca
font_02_sfnt_off00008f02.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8F02 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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