Malicious PDF — malware analysis report

Static analysis result for SHA-256 8fbb5225b051c32c…

MALICIOUS

PDF

36.8 KB Created: 2020-08-13 21:37:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 3ba70baf98ab92aabc901165e99fff06 SHA-1: 3e5c28f0d0f2b087ce82fae15f1bb6233b710efa SHA-256: 8fbb5225b051c32c8b5f6a710ad4533e3328b9ed6d6927ec6763e042abfbed0d
194 Risk Score

Malware Insights

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

The PDF document contains a mass of external links, masquerading as course answers to lure victims. The primary link, https://ttraff.cc/pify?keyword=mindtap+principles+of+economics+answers, is a known malicious redirector. The document body is heavily obfuscated and contains numerous embedded URLs, many pointing to Shopify domains, likely for hosting further malicious content or for SEO manipulation.

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=mindtap+principles+of+economics+answers In PDF document text
    • http://files.louannbauer.com/uploads/1/3/1/4/131437636/957380.pdfIn PDF document text
    • http://mufareb.arthurgietzelt.com.au/uploads/1/3/2/8/132814930/dovisafeka.pdfIn PDF document text
    • http://zilok.norjenes.com/uploads/1/3/2/8/132815296/1240825.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.fontrix.comhttp://www.nhncorp.comIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5059/8562/files/zugotoviraxubi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6829/3287/files/xefipinere.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6643/3435/files/peduredugodaguso.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9898/8954/files/testy_czasy_angielskie.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2373/6725/files/95373322454.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/0363/9970/files/amsoil_signature_series_5w_50.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/7482/8953/files/44752373372.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0608/2717/files/10143701805.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0441/2683/0744/files/tesis_akuntansi_manajemen.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6852/2657/files/basic_life_support_student_manual.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004733.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4733 5400 bytes
SHA-256: a3d1addcb8321e3573c982d3e0ac7c43b4d924962723feff79445a2de6375cad
font_01_sfnt_off00005988.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5988 9924 bytes
SHA-256: 42ff86165a1679dd18e6fc68b83a9accc92273378790d4592e2f67e705dcb85f
font_02_sfnt_off00007b9a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7B9A 2056 bytes
SHA-256: 2e46b36fed23876ebb6e11f7a152916482bd8967c060a582f04975efc8a71266

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