Malicious PDF — malware analysis report

Static analysis result for SHA-256 2a611b2a440ad55d…

MALICIOUS

PDF

45.3 KB Created: 2020-07-31 13:02:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: cddda5c4eda2ff4f81abee8fc222e2f9 SHA-1: 022165eba96c2f3baa8cfa0e8117ae8c651fc21f SHA-256: 2a611b2a440ad55d250b78cc32a30f656ce1ffb65098ef5f969e763bc1417007
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious File

The PDF contains a link to a redirector URL, which is a common tactic for phishing and malware delivery. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK confirms this, and the ML classifier also flagged the PDF as malicious. The document body, though heavily obfuscated, suggests a lure related to 'pet insurance claim form'. The presence of numerous external links, as indicated by PDF_SEO_LINK_FARM, further supports a malicious intent to drive traffic to potentially harmful sites.

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=morethan+pet+insurance+claim+form+pdf In PDF document text
    • http://files.riversidecoc.net/uploads/1/3/0/7/130776401/f268dc304f7e4.pdfIn PDF document text
    • http://files.bluffanimalrescuecommittee.org/uploads/1/3/2/6/132696506/2e8137a.pdfIn PDF document text
    • http://files.rkspeech.com/uploads/1/3/1/4/131438249/9075954.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/1/0436/3137/8590/files/nudevumilugeliju.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4578/8584/files/29581084871.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/1552/0935/files/96815894464.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/6836/4702/files/12331206141.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7195/5351/files/63016890466.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7066/0508/files/kiverasotufenulowori.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/8976/5276/files/23559587776.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4994/3202/files/57393759703.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6450/0122/files/56008927853.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/6644/2406/files/ruleruv.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/2190/0696/files/giwuredilagam.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/1717/3149/files/woxowodufarujama.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_off000070f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x70F9 5280 bytes
SHA-256: 273dfded916683747197b0cb798a0d1dc31924f902e2dc3c31c5455e689b5380
font_01_sfnt_off000082c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x82C0 11108 bytes
SHA-256: 27409a380fbf53eb1a4877905856e4ecf5272226986c5ffa537022ac822356d0

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