Malicious PDF — malware analysis report

Static analysis result for SHA-256 97f51d6773010152…

MALICIOUS

PDF

42.6 KB Created: 2020-08-14 01:30:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 103c855926f2df891efadd7e20d1e0d5 SHA-1: db84a1f24cb8ae947ed4ab590331027d6f4fdb82 SHA-256: 97f51d67730101524776ae36af35a55f4d8124e65f2ca523a7d27167cd733544
194 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.com'. The document body, though heavily obfuscated, contains the same lure text as the URL, 'Best android spelling test app'. The PDF also exhibits characteristics of a link farm, with numerous embedded URLs, many of which point to Shopify domains hosting other PDFs, suggesting a coordinated effort to distribute malicious content. 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.com/pify?keyword=best+android+spelling+test+app In PDF document text
    • http://files.soulcraftmans.com/uploads/1/3/1/3/131380158/bc0af6b652.pdfIn PDF document text
    • http://zanunali.lofgrenmusicstudio.com/uploads/1/3/0/8/130814411/2d8fa4a41d17.pdfIn PDF document text
    • http://files.shelleygentry.com/uploads/1/3/0/9/130969428/rikegopege_punaxugozaz_temivivep.pdfIn PDF document text
    • http://gunumofe.hsforbc.org/uploads/1/3/0/8/130874493/64043ab.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/1/0433/5940/4197/files/naxegegowuxe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/4171/0499/files/lexemawegaw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9119/0167/files/takojezatodiruvepip.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/2189/1746/files/54631378525.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5213/7622/files/786_269_2542.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5486/6333/files/gopiba.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8027/8426/files/46289684974.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/2325/1094/files/zoxaribipusijabuwi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/8562/6520/files/reduce_size_osx.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0446/5816/3865/files/a_twisted_tale_story_of_manipur.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8436/5468/files/rumusasapukiruwupedore.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5462/0059/files/adobe_premiere_trial.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 6

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_off00006973.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6973 5176 bytes
SHA-256: 6892d97e1cd313cff494e541942b44c2eb37d75ded1209a2866a1e72a1d6d372
font_01_sfnt_off00007b15.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7B15 10092 bytes
SHA-256: 8bbfbe5cf51bed39d2407b0050d278056fb2a28a519ef85f034c2764414e0136

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