Malicious PDF — malware analysis report

Static analysis result for SHA-256 bf1437dd3d7690f8…

MALICIOUS

PDF

58.1 KB Created: 2020-08-10 07:41:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: a0bf128299cd4196b8b1cfc6ca6a4471 SHA-1: 6a39a24a4d0b4ee84ee374ee40b3357294d1f4cb SHA-256: bf1437dd3d7690f8317facf06b90026c3b1ea4ef76e49907fc74fd531893118e
194 Risk Score

Malware Insights

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

The PDF contains a link farm and a malicious redirector URL, indicating a phishing or scam attempt. The primary malicious link, https://ttraff.ru/pify?keyword=sociology+notes+in+kannada+pdf+download, is designed to redirect users to further malicious content. The document body, though heavily obfuscated, contains the same redirector URL, reinforcing its malicious intent. The ML classifier also strongly flagged this PDF as malicious.

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=sociology+notes+in+kannada+pdf+download In PDF document text
    • http://netuv.parentrus.eu/uploads/1/3/0/9/130969204/8654f6e35c6a16.pdfIn PDF document text
    • http://fiforojit.kocanada-usa.com/uploads/1/3/1/6/131606490/buzawepuji-fabitin-liwemi-dufewelagegawu.pdfIn PDF document text
    • http://files.catholicinspired.site/uploads/1/3/1/4/131437862/366f3.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/1/0430/9024/7829/files/126020174.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7235/5478/files/49789674263.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/4047/9144/files/xiwedixa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/2991/1957/files/java_authentication_and_authorization_service.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/jokesinoximirupabujikupoj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/9069/6597/files/no_type_lyrics.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5738/8439/files/5824111121.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/8549/5453/files/wekemadugigav.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4742/6965/files/duwebokepowa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/9838/3260/files/7414264573.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/4982/9023/files/michael_vince_advanced_language_practice_free_download.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_off00007704.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7704 5588 bytes
SHA-256: 522649bdb071cf49e8c9cbcae5e7cde948e8c1dec71f9a7e5e0190c7c7c35624
font_01_sfnt_off00008a3d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8A3D 2596 bytes
SHA-256: cb4cd20e1f313521711bc2a74fd007b9f4ce631dfc3841aa6cc8912f7210d3ac
font_02_sfnt_off000095bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x95BF 2320 bytes
SHA-256: d97e055e11de589539a249dfdf9c15aca1e9caf4700104d1763a3a5d87d8f7f2
font_03_sfnt_off0000a011.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA011 11008 bytes
SHA-256: 04e8ba5dbaf984ebbc4f25e769558dabebd44bb338e64a6c691dacb7ab230edb
font_04_sfnt_off0000c519.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC519 16224 bytes
SHA-256: 207faf14306426b668b87aba0c9d447b8ba40b67f0f7b18660ffa0d3c8132265