Malicious PDF — malware analysis report

Static analysis result for SHA-256 ac8b65ddecd3cbd8…

MALICIOUS

PDF

39.7 KB Created: 2020-08-19 14:33:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 971cdb8568d43d4ab2ba850f6acdc8d5 SHA-1: a3b853adad3694f70a5fd3bd6b3edfa5b3628ba1 SHA-256: ac8b65ddecd3cbd8a8c89f53c0e3ef8ee565cd187528730c953a25167ac6175c
194 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, with one specifically pointing to a known malicious redirector. The document body, though partially corrupted, contains text related to a video and the redirector URL. The presence of a link farm heuristic further indicates an attempt to direct users to external, potentially malicious, content. No scripts were extracted, and the primary malicious activity appears to be link-based redirection.

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=video+cinta+luar+biasa+lirik+cover In PDF document text
    • http://files.808boogietcontest.com/uploads/1/3/0/8/130874254/5b9fa2a46f8451f.pdfIn PDF document text
    • http://files.berksartalliance.com/uploads/1/3/0/8/130814605/butudebaradaz.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/1/0433/0133/9304/files/femodipafize.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8514/3965/files/tanukese.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5411/2672/files/86107230432.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0133/9304/files/detefetolugif.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3328/8088/files/89489634561.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9316/4199/files/pogukuwegikudemexuguzolu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/2834/9079/files/guborulaluribatupawupudug.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/0646/6982/files/insubordination_write_up.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/0185/6668/files/market_leader_business_english_advanced.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8450/4474/files/belt_conveyors_for_bulk_materials_cema.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3550/9415/files/84025922831.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/92904811518.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 6

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_off00005d1d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5D1D 5160 bytes
SHA-256: d4c1949a92f2cfd0daefd46a6658a3ea2261d688e6cc0fd78f5085ef54cb1038
font_01_sfnt_off00006eb1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6EB1 10364 bytes
SHA-256: 8eb9e0e7c2cb07d607da60ebd1b64f91fdd148330f6d71f351915d69eb493c4a

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