Malicious PDF — malware analysis report

Static analysis result for SHA-256 a31ee1ab4989b417…

MALICIOUS

PDF

33.7 KB Created: 2020-08-12 02:53:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 6a8109e57ceed8099966fdca6f0a2d56 SHA-1: 71327a8e239dadd6c07b011899bf163c4d743435 SHA-256: a31ee1ab4989b417c630375e6dd47d87e0396b8a49ee32b37153dc9dd17721d0
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a mass of external links, with one critical heuristic identifying a link to a known malicious redirector. The document body, though heavily corrupted, contains text that appears to be a lure for a 'caste certificate form download', and the primary malicious URL is associated with this lure. The presence of numerous Shopify links suggests an attempt to blend malicious links with seemingly benign content, a common tactic for SEO poisoning.

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.com/pify?keyword=caste+certificate+form+download+pdf+jharkhand In PDF document text
    • http://files.waterloohouseporcelain.com/uploads/1/3/2/8/132814219/ea1a03a.pdfIn PDF document text
    • http://files.tangwenfang.org/uploads/1/3/2/7/132740350/folatokaba-vopaborixoneno-wokuron-rewebudenife.pdfIn PDF document text
    • http://files.rihousegop.org/uploads/1/3/2/3/132303081/b4877d78ae4d10.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/1/0434/2664/4125/files/plant_ecology_lecture_notes.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/7138/0383/files/bubble_sort_in_c.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/2841/4618/files/84380003698.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8733/1481/files/ctet_syllabus_2020_6_to_8.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8529/9876/files/77234024926.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6651/3818/files/58728330326.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9654/7230/files/jomogonatuk.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6540/8662/files/50810422831.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/3080/4642/files/bartleby_melville.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0210/0886/files/jejikemefug.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/0753/1432/files/55271513548.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 1

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_off0000468e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x468E 5532 bytes
SHA-256: 8d4177d116fabb29f848d59ee11c500ebc818dc50310ebc5a56e683fb705e282
font_01_sfnt_off0000593e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x593E 9528 bytes
SHA-256: cd27bccc9c0b86171b339223fbeca009d172c222484e4c048e08e6e5d37e4111

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