Malicious PDF — malware analysis report

Static analysis result for SHA-256 fdc98333c856d620…

MALICIOUS

PDF

45.7 KB Created: 2020-07-31 06:10:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 496b418facb890db2110b9021cd3d81d SHA-1: 455bf79c7599060330c6a12138a5cf5b6d89e209 SHA-256: fdc98333c856d620fa916cf814055475f3f60f6a6ae352cc87f08b7ca977d0f5
194 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, a common tactic for redirecting users to malicious sites. One critical heuristic identified a link to a known malicious redirector, ttraff.com, disguised as 'aerobika instructions pdf'. Another heuristic flagged the PDF for containing a mass external PDF link farm, with the primary link pointing to a Shopify domain. These elements suggest a phishing or scam attempt using a lure document to drive traffic to malicious infrastructure.

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=aerobika+instructions+pdf In PDF document text
    • http://files.yauponberrypress.com/uploads/1/3/2/6/132683463/4986403.pdfIn PDF document text
    • http://files.oritahitivc.com/uploads/1/3/1/8/131872298/kokoni.pdfIn PDF document text
    • http://files.acollierastro.com/uploads/1/3/1/6/131607053/rovosiviwuxazum-rowemonedadix-futeja.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/1/0431/2537/5125/files/fawanisaxevekom.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6687/4269/files/59290982536.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7877/0076/files/renomavomufiguzuro.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/sikotifukiv.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/6027/1006/files/xesazitukogosewomizumudil.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7333/9559/files/pujedavesoxi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7076/6750/files/56645971873.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/9621/0594/files/41361751387.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7102/0964/files/katukiliv.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/1862/3896/files/xukawapodufosado.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5904/3749/files/rujudujudobevowalijamefad.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3188/8021/files/sipuzig.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/90442425312.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_off00006ee1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6EE1 5192 bytes
SHA-256: bd9edc2e714d31f6c19af17fa685922555202451757d926194a7041e67a03897
font_01_sfnt_off0000808e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x808E 12956 bytes
SHA-256: 1fc030f870c462bd90392d11b5be43df4b328d93a1cc78a9131a9720d12ebcee

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