Malicious PDF — malware analysis report

Static analysis result for SHA-256 b40c6170fc43200e…

MALICIOUS

PDF

59.6 KB Created: 2020-08-20 11:07:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 5bba781c9cebe79f7eff04254acb2d4c SHA-1: d7ef2b4c3144ad7971d12cd481c3b4399072c0a2 SHA-256: b40c6170fc43200e1ee39e2483216ee2f4ac7ba750f56684ea6c85bb16d565b3
194 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, with the primary heuristic identifying a malicious redirector. The document body, though heavily obfuscated, contains text related to 'performance' and the malicious URL. The file's purpose appears to be to lure users to the ttraff.ru domain, which is flagged as a malicious redirector, likely as part of a phishing or scam campaign.

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=ef+asnotracking+performance In PDF document text
    • http://files.2girlsandabook.com/uploads/1/3/1/8/131857315/rezutiruboxu.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/1/0430/8893/7120/files/sujets_brevet_2020.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/3509/7245/files/2901993167.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3464/7460/files/pofanovajewixitida.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4388/0103/files/nerokawiva.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8517/6736/files/6140958903.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9540/9311/files/45365060097.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0522/2822/files/nonparametric_statistical_methods.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7496/8986/files/grasa_corporal_definicion.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8827/2805/files/kujinajuba.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2058/2050/files/vaginobudesarawurad.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6208/3232/files/d_d_5e_pregenerated_character_sheet_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3765/5191/files/97871118446.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6248/4383/files/answered_prayers_danielle_steel.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007a16.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7A16 5112 bytes
SHA-256: 0db835ff59e7eaae9109f378ab0d7dc1d5b92a4ace3f94ceeb6481b400c9e379
font_01_sfnt_off00008b63.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8B63 15644 bytes
SHA-256: 7dfa968b7154fd56a37f113709961f6d43104d10cb89d458590069bb0755a7f8
font_02_sfnt_off0000bcf3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBCF3 16660 bytes
SHA-256: 71fe66e8a900eabe62c773f6b9b467243c87e6d484dd0ea34a22194082714177
font_03_sfnt_off0000d326.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD326 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378