Malicious PDF — malware analysis report

Static analysis result for SHA-256 aeccca5e8c5d9fa8…

MALICIOUS

PDF

47.6 KB Created: 2020-08-29 19:18:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: a8fc65d0ed18010f0ee9006f56cfc2a8 SHA-1: 35aee664776f120b585e4247315a4c5df94f2e2e SHA-256: aeccca5e8c5d9fa8a0b29dd5046641db14bb5e06b09e117081855cd4feded984
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.link/wix?keyword=crucigramas+matematicos+para+secunda'. The document body, though heavily obfuscated, also contains this URL and numerous other links to PDF files hosted on static.usrfiles.com, suggesting a link farm or redirection strategy. The primary intent appears to be directing users to malicious infrastructure under the guise of providing a crossword puzzle.

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.link/wix?keyword=crucigramas+matematicos+para+secunda 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_9bc2e08d076f4eeaba5a49481af29a07.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_a6b1f197b51947cfb8d0d19ce9cda23c.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/60933b_19c87caf597d491898e2eb4e62167a24.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_00599d8ac6fc4720becba405955ae7e7.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0462/4475/7664/files/6871366036.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0496/0676/files/32587661397.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/9222/0829/files/nintendo_3ds_pokemon_games_rom.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7014/4166/files/soketuzipekedilasizokejo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/31082235151.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_fe0b654dd6f3450fa4922c0acb5911b7.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_0cbffd95719a48abb4eb29ecff715736.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/9c43ec_534a24be45cc4830aec75972b072042d.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_5b60b0c50f844d458b006f84c3d5d206.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/bdeb4c_9c0aa43334d94222ba9e176290ac42cc.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 3

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_off000062ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x62CA 5264 bytes
SHA-256: bd32d75400563ec782e790c76721fcf919c48383f721e847831a1ddc3d5c5f40
font_01_sfnt_off0000748f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x748F 11716 bytes
SHA-256: 393e57209bb888397be48cab2d2452c2db0914e708776ec85fa446596f22de6d
font_02_sfnt_off00009a7f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9A7F 16124 bytes
SHA-256: 25b4721464b7316f01e21ed2c3faf4040515a2c9bdaa67695c41ecc6d6989cce

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