Malicious PDF — malware analysis report

Static analysis result for SHA-256 553ce4d5b7b2d136…

MALICIOUS

PDF

50.3 KB Created: 2020-08-25 17:02:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 93a102eec997d4251b3865fdbbebbebf SHA-1: 7a69985095b094a4c919ca93236082bc7e438172 SHA-256: 553ce4d5b7b2d136c07d9551117051a1d28eb861a8993401b6fdfd0584a8e85d
194 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, directing users to 'https://ttraff.com/pify?keyword=zoology+bsc+1st+year+book+pdf'. This URL is part of a link farm designed to lure users with seemingly legitimate content, such as book downloads. The document body also contains this URL, reinforcing the social engineering aspect. The primary goal appears to be redirecting users to malicious infrastructure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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=zoology+bsc+1st+year+book+pdf In PDF document text
    • http://files.freekidstories.org/uploads/1/3/0/8/130813461/ragaxiwesorijox_zolifaxinejado.pdfIn PDF document text
    • http://files.martin-land.com/uploads/1/3/1/6/131636584/dubazuwowiwek.pdfIn PDF document text
    • http://files.regionalpropertynsw.com/uploads/1/3/2/6/132681863/buzesuzavekoral-lizufozememisid-lebumaponepov-bejaxedavev.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5495/6695/files/12689861241.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6764/5852/files/fakamazanexodawe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/6990/5825/files/barreras_administrativas_de_la_comunicacion.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/0015/8629/files/articles_worksheet_for_grade_4.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4591/1709/files/24528226114.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0441/1306/8184/files/correct_the_errors_in_the_sentence_worksheets.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3978/5111/files/6531984061.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/9720/1576/files/97195627396.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

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005918.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5918 5636 bytes
SHA-256: 6dccee4034a2e739b68c773670a589a4b09ded6a52cec9a0bc22bf84c81e9416
font_01_sfnt_off00006c69.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6C69 3204 bytes
SHA-256: 35c0a746fcdf55e64f2ba55209f6a139fa5d4ea47dce36c63c78d1e6d66b29b6
font_02_sfnt_off0000795a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x795A 2320 bytes
SHA-256: d97e055e11de589539a249dfdf9c15aca1e9caf4700104d1763a3a5d87d8f7f2
font_03_sfnt_off000083ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x83AC 10076 bytes
SHA-256: a847df120be75769738ebf171fbe1e24a9c59ab37918b2567a1d2bdc26e28e9b
font_04_sfnt_off0000a62a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA62A 16224 bytes
SHA-256: 207faf14306426b668b87aba0c9d447b8ba40b67f0f7b18660ffa0d3c8132265