Malicious PDF — malware analysis report

Static analysis result for SHA-256 31927392ab814508…

MALICIOUS

PDF

68.8 KB Created: 2020-08-12 03:21:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 8a4cf75fd0b68a94fec0665666eea019 SHA-1: 755a9e78996838dc74f67df5d6ea5af9e1d4e87d SHA-256: 31927392ab814508b14dd2adfa479b3f61a55ad81aa3b5cd644153563634164a
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, pointing to 'ttraff.ru'. The document body, though heavily obfuscated, contains the same URL and text as the redirector's keyword parameter, suggesting a lure. The PDF also contains a large number of external links, many hosted on Shopify, which is indicative of a link farm used for SEO poisoning or to obscure the final malicious destination.

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=bender+gestalt+test+scoring+manual+pdf In PDF document text
    • http://files.compassionatepathways.org/uploads/1/3/0/7/130740056/newowaxilepog.pdfIn PDF document text
    • http://files.vetsourcecanada.com/uploads/1/3/0/8/130873708/9817695.pdfIn PDF document text
    • http://wekudoxi.biocompositesgroup.com/uploads/1/3/1/4/131408738/1ded3bde133833e.pdfIn PDF document text
    • http://files.belzevfilms.com/uploads/1/3/1/3/131397973/vokikejafi_nizeje.pdfIn PDF document text
    • http://rulefi.heartlandhospicemj.com/uploads/1/3/1/3/131379578/6826818.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/1/0437/0631/9001/files/case_files_pharmacology_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/3563/8425/files/rimepali.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7503/4520/files/event_id_10016.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/96226605796.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7245/3797/files/56817526459.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5624/1557/files/dujaxunato.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3552/5282/files/92630150369.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/6728/4387/files/dermagist_neck_cream.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0279/7986/files/nisowuvejew.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/7577/1304/files/paxamidawiromanijofel.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0441/1123/3176/files/lezetaletivazolofuvodu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/5753/5390/files/9061388819.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/3234/4736/files/disable_mouse_acceleration.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

Related samples 7

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cdda.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCDDA 5524 bytes
SHA-256: 4899b4d80bdab4e47c010b7ec3fe0651dee9048185693967028a3f739acfe5e3
font_01_sfnt_off0000e08c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE08C 10828 bytes
SHA-256: 38a1c2857a21ff22479229be4313045c06a42ea1d88854b4d7cfb9667f1fe2c6

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