Malicious PDF — malware analysis report

Static analysis result for SHA-256 d0bd8210c181ec11…

MALICIOUS

PDF

42.2 KB Created: 2020-08-15 17:23:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f70ca046afaa7046f6dbace8440545ba SHA-1: aecfc87835115a0bf34c055e21d4143588bf34db SHA-256: d0bd8210c181ec11883782ab26b201672141e4bc07fcef8431a81829397ff752
152 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to Shopify domains, but one critical link redirects to a known malicious domain (ttraff.com). This suggests a link farm or redirection tactic to obscure the final malicious destination. The ML classifier strongly flagged this PDF as malicious, supporting the assessment of a redirection-based attack pattern. No scripts were extracted, but the presence of the malicious redirector is the primary indicator of compromise.

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.com/wb?keyword=pengertian%20bahasa%20fungsi%20bahasa%20dan%20ragam%20bahasa%20pdf
    • http://lagurode.marinasole.com/uploads/1/3/1/6/131637395/bezulovim.pdf
    • http://files.whiskeypirate.com/uploads/1/3/1/6/131606467/4337941.pdf
    • https://cdn.shopify.com/s/files/1/0431/7705/0272/files/btec_level_3_health_and_social_care_revision_guide.pdf
    • https://cdn.shopify.com/s/files/1/0440/6899/5224/files/nusabapafemoxu.pdf
    • https://cdn.shopify.com/s/files/1/0427/7354/5116/files/babycakes_donut_maker.pdf
    • https://cdn.shopify.com/s/files/1/0430/0088/9507/files/10925601191.pdf
    • https://cdn.shopify.com/s/files/1/0431/0938/4343/files/13019664361.pdf
    • https://cdn.shopify.com/s/files/1/0431/3654/9018/files/78370961104.pdf
    • https://cdn.shopify.com/s/files/1/0437/7473/8586/files/risk_2020_rules.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/84574839703.pdf
    • https://cdn.shopify.com/s/files/1/0429/6785/9359/files/america_the_story_of_us_cities_worksheet_answer_key.pdf
    • https://cdn.shopify.com/s/files/1/0434/6249/2313/files/56117453033.pdf
    • https://cdn.shopify.com/s/files/1/0431/5312/9640/files/78085206230.pdf
    • https://cdn.shopify.com/s/files/1/0431/8943/6580/files/rosodej.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005ab6.bin
66393152c1244bc80a975157d83bb20a0c134e290cec155cc7dd1a6c9330c9bd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5AB6 5336 bytes
font_01_sfnt_off00006c9a.bin
f3a2420d76548daeeee9454ea30a95ba50038e092081a3ecc378de12196328ba		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6C9A 9532 bytes
font_02_sfnt_off00008d3a.bin
9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8D3A 4324 bytes

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