Malicious PDF — malware analysis report

Static analysis result for SHA-256 714304da6bee3f58…

MALICIOUS

PDF

32.3 KB Created: 2020-08-14 08:48:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 96a86baab041119ed07a2e0eaed3d1ad SHA-1: 94ad2ba0697eb21299ab46936169132dc5611c0c SHA-256: 714304da6bee3f58b4335ccc31f92d1968e737d0efa48f51de12c6619b735552
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one identified as a malicious redirector. The ML classifier also flagged this PDF as malicious. The presence of a link farm suggests an attempt to distribute malicious content or engage in SEO manipulation for phishing purposes. No scripts were extracted, but the embedded links are the primary indicators of malicious intent.

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=alienware+15+r2+manual
    • http://files.lblhoops.com/uploads/1/3/1/4/131437750/075c8b5265f28.pdf
    • http://files.liquidsunshinedesigns.net/uploads/1/3/1/6/131606644/6427307.pdf
    • http://files.4compliments.com/uploads/1/3/1/4/131405951/659210.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/8406/2622/files/99760581537.pdf
    • https://cdn.shopify.com/s/files/1/0429/6785/9359/files/41915891226.pdf
    • https://cdn.shopify.com/s/files/1/0434/4456/8220/files/brche_in_dezimalzahlen_umwandeln_bungen.pdf
    • https://cdn.shopify.com/s/files/1/0427/4431/6070/files/matlab_compare_strings.pdf
    • https://cdn.shopify.com/s/files/1/0435/7865/4883/files/winutepadej.pdf
    • https://cdn.shopify.com/s/files/1/0434/1451/9973/files/63442286729.pdf
    • https://cdn.shopify.com/s/files/1/0445/6821/5716/files/xumulojovakaregusipo.pdf
    • https://cdn.shopify.com/s/files/1/0434/4230/7239/files/44000114341.pdf
    • https://cdn.shopify.com/s/files/1/0429/0409/2828/files/kasog.pdf
    • https://cdn.shopify.com/s/files/1/0432/5621/7750/files/sexulotokone.pdf
    • https://cdn.shopify.com/s/files/1/0439/5152/1947/files/93692771623.pdf
    • https://cdn.shopify.com/s/files/1/0429/8165/4679/files/physiologie_du_systme_respiratoire.pdf
    • https://cdn.shopify.com/s/files/1/0437/8345/4872/files/badolasenomuxilig.pdf
    • https://cdn.shopify.com/s/files/1/0437/2345/6661/files/98767412830.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_off00004560.bin
759b0d6ce2693fa174572289a1baeb38576898b8f23120a34a8db03119c2b01c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4560 5044 bytes
font_01_sfnt_off0000568b.bin
408bc6c3bd315725a1a2765b36e0fdd9b41b3f568843611d5495a6aead75df89		 pdf-font-stream PDF embedded font (sfnt) at offset 0x568B 8756 bytes

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