Malicious PDF — malware analysis report

Static analysis result for SHA-256 77b166b17995607d…

MALICIOUS

PDF

43.5 KB Created: 2020-07-29 17:40:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 75ed0e10075a0da000f48cdeb4d34242 SHA-1: faaabe53339c386271b01f5f568d91203ac58977 SHA-256: 77b166b17995607d07a82e2917b77f42a226c633bd589d65ed42711a9abc6a57
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links pointing to a redirector URL, which is a common tactic for phishing or malware distribution. The heuristic firings indicate that the PDF is designed as a link farm, likely to trick users into downloading malicious content or visiting malicious websites. The ML classifier strongly supports the malicious nature of this PDF.

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=directions+in+sociolinguistics+the+ethnography+of+communication+pdf In PDF document text
    • http://files.gaggiadirect.com/uploads/1/3/1/4/131407692/fd4ca2e51c520.pdfIn PDF document text
    • http://files.janbyrneceramics.com/uploads/1/3/0/7/130775633/wefudizadigov.pdfIn PDF document text
    • http://files.cookiedecoratinginsingapore.com/uploads/1/3/1/4/131454034/2078984.pdfIn PDF document text
    • http://files.opendoorhousing.org/uploads/1/3/1/4/131455475/5897595.pdfIn PDF document text
    • http://files.ukcamperhire.uk/uploads/1/3/2/6/132682303/4929cfc58f8.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/45292738862.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/5235/8042/files/vedugo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6299/2795/files/veziwifiwevimilerebedol.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7829/5450/files/fupaxeguvetikebubudom.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5569/3470/files/65272123770.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4447/0933/files/49403744228.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/0593/3730/files/sovopavoramewokitatalapug.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5588/1121/files/73876918656.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8170/3319/files/dimojodisupo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/0833/4744/files/jotusojuwobiwemolot.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/7981/1750/files/puxotatawafitenena.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 7

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_off00006ac0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6AC0 5552 bytes
SHA-256: 5e2f40515c8ec16f1716a3d0fee01a489224548093b9115f23b0730958a95b50
font_01_sfnt_off00007d7a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7D7A 10124 bytes
SHA-256: 10ce7c05163f7a008e4d92fbd00e36691115994680f8066d70cbd497e2ecc0b2

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