Malicious PDF — malware analysis report

Static analysis result for SHA-256 ab41f7df083a004f…

MALICIOUS

PDF

40.5 KB Created: 2020-07-12 08:50:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ebab5ecf05a618aeac68f5d72a6842e8 SHA-1: 3bbc7d43ae9a6048a77ffc94aef936a2fa42d293 SHA-256: ab41f7df083a004f7ba18c2589169a6429436172b4cab72b360ab8cffd5d07fd
154 Risk Score

Malware Insights

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

The PDF was flagged by a machine learning model as malicious and contains numerous embedded links. One critical heuristic identified a link to a known malicious redirector, ttraff.cc, which likely serves as a gateway to further malicious content. Another critical heuristic indicated a large PDF link farm, suggesting a tactic to artificially inflate search engine rankings or distribute malware. The presence of these link farms and redirectors points towards a malicious intent to lure users to potentially harmful sites.

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=a+small+place+full+text
    • http://files.growingbolderfitness.com/uploads/1/3/1/4/131407823/a33d000.pdf
    • http://files.shark-bites.net/uploads/1/3/0/9/130969990/pumew.pdf
    • http://files.thequeensmagnet.com/uploads/1/3/2/7/132740682/4818801.pdf
    • http://files.dariassoap.com/uploads/1/3/1/3/131397930/2aa8adccd7.pdf
    • http://files.connielandis.com/uploads/1/3/1/3/131384335/fubokam.pdf
    • http://files.phocrystal.com/uploads/1/3/0/9/130969301/e795d624a3acec.pdf
    • http://files.jonathanlumsden.com/uploads/1/3/2/6/132696112/bodax.pdf
    • http://files.nurturedbirthservices.com/uploads/1/3/0/8/130813646/6143167.pdf
    • https://dapeneko.files.wordpress.com/2020/06/62797411604.pdf
    • https://viwedibimu.files.wordpress.com/2020/06/legidemevezukedojob.pdf
    • https://gutagaperub.files.wordpress.com/2020/07/musikopotutoduworoxupuga.pdf
    • https://jafanukezilo.files.wordpress.com/2020/06/nisajisobobekuxozo.pdf
    • https://mubupemigiv.files.wordpress.com/2020/06/lodogekufejexoxibiture.pdf
    • https://cdn.shopify.com/s/files/1/0429/9961/1553/files/56981141632.pdf
    • https://cdn.shopify.com/s/files/1/0429/9807/1450/files/45041596241.pdf
    • https://cdn.shopify.com/s/files/1/0432/1270/1854/files/lopanidojikukewuxawijoj.pdf
    • https://cdn.shopify.com/s/files/1/0432/8977/2190/files/91341802256.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/xasaxikopakepiditewevumub.pdf
    • https://cdn.shopify.com/s/files/1/0430/4207/8877/files/94539384824.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/64989875230.pdf
    • https://cdn.shopify.com/s/files/1/0427/6381/3020/files/85843644642.pdf
    • https://cdn.shopify.com/s/files/1/0427/9926/8003/files/67196052238.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000062e3.bin
03f17ad526a08dff77cc6549ab1845d2842a72fde2b1cd6df18cd3071c1bdfb8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x62E3 4740 bytes
font_01_sfnt_off00007306.bin
577a98d6ce6c7cb45bb892a5a88351984d36d85ddaad1864c7799928c8a0c7b7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7306 10012 bytes

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