Malicious PDF — malware analysis report

Static analysis result for SHA-256 cfa49c2ddae8b5b2…

MALICIOUS

PDF

43.3 KB Created: 2020-08-16 19:54:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 2db4d7809a0bdffcd1a36e30ab339287 SHA-1: fa460d89be8233ea8c9151613238eeec95d9b80d SHA-256: cfa49c2ddae8b5b2418663ef518d4713666acd9148fae077ee9776a987140097
194 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic firing indicating a link to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains text related to educational material and a URL that appears to be part of a link farm designed to attract users. The ML classifier also strongly flagged this PDF as malicious. The primary attack pattern involves luring users to malicious sites via deceptive links within the document.

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=chemistry+1+worksheet+atomic+structure+2 In PDF document text
    • http://suwok.thequiltinggardener.com/uploads/1/3/1/3/131380126/pijavufixom_majojexo_desaw.pdfIn PDF document text
    • http://files.mydancedimensions.com/uploads/1/3/0/7/130776073/6703351.pdfIn PDF document text
    • http://files.lrxkinex.com/uploads/1/3/0/7/130738622/wimimone_vakikadi_texami.pdfIn PDF document text
    • http://jofafu.sippicanchoralsociety.org/uploads/1/3/0/7/130776688/e5fa12c9e9ddd0.pdfIn PDF document text
    • http://dowoxime.mrmoeshow.com/uploads/1/3/0/7/130776760/latum.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/1/0434/0996/5212/files/ways_of_the_world_3rd_edition.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2370/3970/files/91144349889.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6880/8613/files/69989427188.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1682/2692/files/sudakojabemujurewive.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5199/0691/files/17853115800.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/9740/0223/files/63667253656.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9386/8187/files/jufobiwojiguxokojofera.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/9572/5982/files/gakija.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2301/5836/files/61419476719.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_off00006a5e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6A5E 5356 bytes
SHA-256: 9838dc5308528130a65d6b95569a1d1632389d506ce9e15d344b3341cc5fa7f8
font_01_sfnt_off00007c89.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7C89 10540 bytes
SHA-256: 0a12efb147f96f0b4a9edb91c1a274ecf125dd27388fceec9888264e16d73c70

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