Malicious PDF — malware analysis report

Static analysis result for SHA-256 180b6ad07cdeaea8…

MALICIOUS

PDF

35.0 KB Created: 2020-08-06 05:30:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e3f9d2973f09155fa4fb0dd4a33fe347 SHA-1: 9b4180869522e0d28c49a459bf487a06a08d14ff SHA-256: 180b6ad07cdeaea88c000631b42e192b7027439025224e17f830f298d352006a
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to Shopify domains hosting other PDFs, suggesting a link farm or SEO poisoning tactic. One prominent link, disguised as a free medical dictionary download, redirects through `ttraff.cc`, a known malicious redirector. This indicates a phishing or scam attempt to drive traffic to malicious infrastructure.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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=taber+s+cyclopedic+medical+dictionary+23rd+edition+pdf+free+download
    • http://files.wagonwheelmt.com/uploads/1/3/0/9/130969656/8260ebcce.pdf
    • http://files.fisherphotoanddesign.com/uploads/1/3/1/6/131637562/219f0105759.pdf
    • http://files.barnyardventures.org/uploads/1/3/0/7/130776487/2544321.pdf
    • http://files.ataraxiaphotography.com/uploads/1/3/1/4/131455883/jazozixure.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/6195/2155/files/62237926071.pdf
    • https://cdn.shopify.com/s/files/1/0434/7605/8274/files/57506295713.pdf
    • https://cdn.shopify.com/s/files/1/0435/8488/0798/files/timer_in_c.pdf
    • https://cdn.shopify.com/s/files/1/0431/5450/5882/files/stardew_valley_fish_bundle.pdf
    • https://cdn.shopify.com/s/files/1/0433/0776/1819/files/barbara_o_neill_natural_remedies.pdf
    • https://cdn.shopify.com/s/files/1/0427/5575/2103/files/4096275827.pdf
    • https://cdn.shopify.com/s/files/1/0432/0067/6001/files/wow_sunken_temple.pdf
    • https://cdn.shopify.com/s/files/1/0430/4617/4877/files/17454319805.pdf
    • https://cdn.shopify.com/s/files/1/0435/2226/1143/files/39992192519.pdf
    • https://cdn.shopify.com/s/files/1/0432/8616/7702/files/acetilcisteina_infantil_bula.pdf
    • https://cdn.shopify.com/s/files/1/0428/1604/5222/files/84020754419.pdf
    • https://cdn.shopify.com/s/files/1/0431/9281/1669/files/8369881781.pdf
    • https://cdn.shopify.com/s/files/1/0429/3849/9235/files/9258225155.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004a81.bin
774935d40d625384da71b1203e2d2c24793969e0853646d62edb71e74ab06778		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4A81 5880 bytes
font_01_sfnt_off00005e81.bin
6255c8cff6f1059261bae77487b5ab02377e740c71a3c1c7973b49b162479b43		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5E81 9320 bytes

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