Malicious PDF — malware analysis report

Static analysis result for SHA-256 a99b4b06527f98df…

MALICIOUS

PDF

86.2 KB Created: 2020-08-12 02:12:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 4af5654542b6ab0a6d9afb64d5ccc39f SHA-1: 0c76d6fc2c5e27804256a7679380ddb99d2148f7 SHA-256: a99b4b06527f98dfd1ffe2cfd0e7440d59c1584b4d3488cf51fb6c341e46b1d4
194 Risk Score

Malware Insights

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

The PDF was flagged for containing a malicious redirector link and a large number of external PDF links, indicating a link farm. The primary malicious URL identified is https://ttraff.ru/pify?keyword=khalifah+bani+abbasiyah+pdf. This suggests the document's purpose is to lure users to malicious sites, likely for phishing or malware delivery.

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.ru/pify?keyword=khalifah+bani+abbasiyah+pdf In PDF document text
    • http://nufab.enidbridalshop.com/uploads/1/3/1/4/131483200/4820946.pdfIn PDF document text
    • http://files.mollycoolapproved.com/uploads/1/3/1/4/131454098/b680e25af.pdfIn PDF document text
    • http://nejakuwe.artbodysoulstudio.com/uploads/1/3/1/3/131378960/c642c46.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8072/0294/files/12367119578.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/2017/9864/files/10403045486.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/9531/6896/files/module_8_basic_aerodynamics_book.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/xugufu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0649/2823/files/nulimovosibizarup.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8564/3419/files/mifofepufasufunowe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/6977/4750/files/jodavari.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6949/5710/files/caput_succedaneum_adalah.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/2172/9955/files/fanafufuromebakulevepami.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/3422/0456/files/fabiboxowigokizes.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/4933/7507/files/78175215472.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.org/OFLIn 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
stream_006_off000130f2.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x130F2 17532 bytes
SHA-256: 5a3067ee095e55edde9b1419b1a766d1181de76d574d030cbde3b7ca7e17d147
font_00_sfnt_off0000fc3f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC3F 5244 bytes
SHA-256: f67fb3917151526e016c5a897fabf3e15f70775362fac7ebc645743f0b4125dd
font_01_sfnt_off00010e13.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E13 10124 bytes
SHA-256: 1a9a93a02b92557b61dbf0bcf4fd7231156a952e9bdf05ec3473bba62d858b8d

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