Malicious PDF — malware analysis report

Static analysis result for SHA-256 686cab6d806008a1…

MALICIOUS

PDF

42.3 KB Created: 2020-08-03 18:19:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 2b8a043b4168791925e16289f41106b8 SHA-1: bc21e172cfd83c1d5cf55e24baf3e70fa315f8fc SHA-256: 686cab6d806008a11a567bfd3bfc194bb78f43a9987f0bc9b303eab71ae56c71
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains multiple embedded URLs, with a primary redirector identified as malicious. The document body, though heavily obfuscated, contains text suggesting a 'coupon' lure, aligning with the heuristic findings of a link farm and SEO redirector. The ML classifier strongly indicates maliciousness, and the primary IOC is a redirector URL that likely leads to further malicious content or phishing attempts.

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=bk+coupons+august+2020+pdf In PDF document text
    • http://files.airlinepilotservice.com/uploads/1/3/2/7/132741555/getoduv.pdfIn PDF document text
    • http://files.surrenderedtochrist.org/uploads/1/3/2/6/132681656/wulegi.pdfIn PDF document text
    • http://files.violiningaja.com/uploads/1/3/1/6/131606672/xinajatisugojetojage.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/1/0428/9835/8432/files/23281911610.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/tizerosotusalasebix.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2021/4681/files/logan.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6451/7023/files/gumagununogodasoxef.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3273/1038/files/58587996138.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9213/2508/files/famerilebigorelunufub.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/4777/8469/files/2459792336.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9712/1178/files/cr_10_monsters_5e.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5820/8674/files/burefizaramapomile.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8510/3258/files/vokininisakonate.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6960/2981/files/18872144089.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/negonarufefozosaburesid.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5049/2316/files/woxijazetofu.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 8

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_off0000658b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x658B 5584 bytes
SHA-256: 0c3c64d7812edadc1df8e383293ef48c79fd97901c7dd110b14a6e80bb3b7cf3
font_01_sfnt_off000078b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x78B0 10328 bytes
SHA-256: 579d7fc608ecc512d3c369de5ee0ed8a8e70ffd550effc5e3fa25db52fc6c09b

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