Malicious PDF — malware analysis report

Static analysis result for SHA-256 16c218b3db39e895…

MALICIOUS

PDF

46.3 KB Created: 2020-08-22 02:22:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 296504d8d0e68d8f560d2a3ddae86b0d SHA-1: 68a69d4ceb620cb1d90faf8b66727b8530a070d6 SHA-256: 16c218b3db39e8953600645ace8376c3f683f300721f36690a20fbde4ae2d291
154 Risk Score

Malware Insights

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

The PDF contains embedded links, one of which directs to a known malicious redirector infrastructure. The document body and embedded links suggest a lure related to a movie, likely intended to trick users into clicking through to a malicious site. The presence of numerous external PDF links further indicates a link farm or SEO manipulation tactic, potentially for distributing malware or conducting phishing.

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=alvin+and+the+chipmunks+2009+movie
    • http://files.mayoabbeyns.com/uploads/1/3/1/6/131637056/sutowu.pdf
    • http://files.stmaryselmbridge.org/uploads/1/3/1/3/131380985/c172952798f6ec.pdf
    • http://wajusi.keyconceptsco.com/uploads/1/3/1/4/131482995/butipa.pdf
    • http://supefuvab.phillipsandphillipsmusic.com/uploads/1/3/0/8/130813694/jexufasawumakevatane.pdf
    • http://files.callinidiore.com/uploads/1/3/0/7/130739155/xomanenenaku_jozokilesugefux_sogaxegage_pasejaf.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0429/8424/3351/files/voriwavulowumevekirob.pdf
    • https://cdn.shopify.com/s/files/1/0435/6459/7397/files/alabama_new_hire.pdf
    • https://cdn.shopify.com/s/files/1/0440/5464/2853/files/bonolota_sen_poem.pdf
    • https://cdn.shopify.com/s/files/1/0433/0124/0992/files/zuvelodejegevanokik.pdf
    • https://cdn.shopify.com/s/files/1/0434/0006/9285/files/tawobudojigelu.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/84312174386.pdf
    • https://cdn.shopify.com/s/files/1/0439/0790/7752/files/suxepinura.pdf
    • https://cdn.shopify.com/s/files/1/0435/3956/2651/files/17755691938.pdf
    • https://cdn.shopify.com/s/files/1/0435/5453/7624/files/meat_buyers_guide_8th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0434/9437/5576/files/mexaz.pdf
    • https://cdn.shopify.com/s/files/1/0433/2571/8678/files/balsamic_vinegar_recipes.pdf
    • https://cdn.shopify.com/s/files/1/0431/6643/3435/files/win_10_1903_error.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_off0000752f.bin
cca63a1f065439f30e7cebbed0795b4271a5d4a03728ab5de2732a7b7f2b237e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x752F 5760 bytes
font_01_sfnt_off0000889a.bin
58fbd2b8fd4bfdc166ae2437b0d1b632f42ce71feb54c46d826c65310a9d677f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x889A 10420 bytes

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