Malicious PDF — malware analysis report

Static analysis result for SHA-256 8d8d95b4412c0575…

MALICIOUS

PDF

42.0 KB Created: 2020-08-04 03:18:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 2a65faa9e81c16c0f828dc235f1822d8 SHA-1: ffa715f50e3af47c5b12a10cc4c99772d89fa508 SHA-256: 8d8d95b4412c0575d06b8908b9ebe4953e10d9cba807a23a4d91ec90fc3cb7eb
194 Risk Score

Malware Insights

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

The PDF document was flagged as malicious by a machine learning classifier and contains a critical heuristic indicating a malicious redirector link. The primary malicious URL identified is https://ttraff.cc/pify?keyword=basic+knowledge+of+ms+office+pdf, which is likely used to redirect users to a malicious site. The document also contains a large number of external PDF links, many hosted on Shopify, which is characteristic of SEO link farm abuse.

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.cc/pify?keyword=basic+knowledge+of+ms+office+pdf In PDF document text
    • http://files.griffis4history.com/uploads/1/3/1/8/131856135/3164092.pdfIn PDF document text
    • http://files.vesnazidovec.com/uploads/1/3/1/3/131383665/tigozapobazuwamat.pdfIn PDF document text
    • http://files.lisapellingdietitian.com/uploads/1/3/1/0/131069899/798cc.pdfIn PDF document text
    • http://legebigas.ohioruralwater.org/uploads/1/3/0/8/130874304/durizopesewa_xidofiser.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/1/0441/4416/5016/files/7225657955.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/2081/2441/files/root_nexus_6_marshmallow.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7244/4823/files/lixumojiseketekigiwan.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7339/6133/files/tatabusak.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4557/6088/files/soreroziputijitek.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9520/3745/files/86383172701.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6753/0655/files/pegepivifanakufewukexe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6871/8242/files/kuvawe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7720/6165/files/quadrajet_carb_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/9477/8791/files/9930142132.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/8296/3361/files/regagidukemujek.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 5

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_off0000648f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x648F 5584 bytes
SHA-256: 2593bee04e6b4c68176c0ca9cea13ca02e9393553177b7a4aa4c8a358bd803c7
font_01_sfnt_off000077a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x77A8 10524 bytes
SHA-256: bc6c454ee474a962bbbb7ede3ca4cb42d9a61697e9d7c92dd16092d9989b7fb3

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