Malicious PDF — malware analysis report

Static analysis result for SHA-256 5cb1d8f4b83b644e…

MALICIOUS

PDF

40.7 KB Created: 2020-08-20 09:03:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 83ba067ec0a110be39741973cd245cb0 SHA-1: 176eeb7ea26e4fd6d500481bf0fce21a98b04b4c SHA-256: 5cb1d8f4b83b644ee9e7e568b1f3c0c3703cd607e7ffb21dd7b559135a76b7b4
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of embedded links, many pointing to Shopify domains, but also includes a critical link to a known malicious redirector at `https://ttraff.ru/pify?keyword=codominance+and+incomplete+dominance+practice+problems+answers`. This suggests the document is part of an SEO link farm or a phishing campaign designed to funnel users to malicious infrastructure. The ML classifier also strongly indicated maliciousness.

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=codominance+and+incomplete+dominance+practice+problems+answers In PDF document text
    • http://files.meganmcgory.com/uploads/1/3/1/6/131606465/914981.pdfIn PDF document text
    • http://files.tidytimeservices.com/uploads/1/3/2/6/132680781/niremoliwejadazeg.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/1/0432/4953/3088/files/2311539210.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9252/4700/files/30140282327.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0452/5296/8609/files/o_candomble_da_bahia.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/1350/5185/files/18121078215.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7624/7967/files/jugevitigod.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/6911/0432/files/pentagonal_prism_net.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/7954/1671/files/vujosaroxunuxelojobiw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1549/6092/files/38369050011.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0446/3493/1363/files/l_nergie_renouvelable_au_maroc.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/1604/5222/files/jiwetabapiranivapuvel.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 2

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_off0000613a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x613A 5356 bytes
SHA-256: a12ef56407d312759319d30a7f84c9cee161bf730b7cd0b68ed0fcac0c91e37e
font_01_sfnt_off00007359.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7359 9992 bytes
SHA-256: 3cbd2588fb94bfcc418793a132f9769787f102f50e8c519a49b134630e174faa

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