Malicious PDF — malware analysis report

Static analysis result for SHA-256 123a41f962a00088…

MALICIOUS

PDF

48.9 KB Created: 2020-08-12 21:36:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5229bec9c0e78f31377cdbfc171de507 SHA-1: 1e50c16bfe13fcf898756db1e7636122cfffb76d SHA-256: 123a41f962a00088ce832639264fe823c24f5f0e33113b96738b39907045e243
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains numerous links to external PDF files, many hosted on Shopify, suggesting a link farm or SEO manipulation tactic. One of the primary links, 'https://ttraff.cc/wb?keyword=2005%20honda%20element%20user%20manual', is identified as a malicious redirector, indicating an attempt to lead users to harmful content. The ML classifier also strongly flagged this PDF as malicious.

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/wb?keyword=2005%20honda%20element%20user%20manual
    • http://files.thematic-learning.org/uploads/1/3/0/7/130776327/1891e449.pdf
    • http://files.antiquepastels.com/uploads/1/3/0/7/130775958/sadoxi.pdf
    • http://files.polarityannarbor.com/uploads/1/3/1/4/131437276/xixakegad_zubifabiwi.pdf
    • http://files.robinmoulynart.com/uploads/1/3/1/4/131411688/03a8ac3.pdf
    • http://files.strengthinnumberstutoring.org/uploads/1/3/1/3/131398117/2357852.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0432/2479/3245/files/69533640061.pdf
    • https://cdn.shopify.com/s/files/1/0431/3900/6632/files/xavapidilup.pdf
    • https://cdn.shopify.com/s/files/1/0450/6664/9750/files/numbers_divisible_by_5.pdf
    • https://cdn.shopify.com/s/files/1/0431/5932/2773/files/siwijifowitububusozexoko.pdf
    • https://cdn.shopify.com/s/files/1/0435/5453/7624/files/gibekuxopelolisojekidapat.pdf
    • https://cdn.shopify.com/s/files/1/0450/0937/1286/files/vision_ias_budget_2020_20.pdf
    • https://cdn.shopify.com/s/files/1/0431/5817/5906/files/47937345050.pdf
    • https://cdn.shopify.com/s/files/1/0440/8619/8424/files/54998386175.pdf
    • https://cdn.shopify.com/s/files/1/0428/8934/7228/files/ge_profile_arctica_refridgerator.pdf
    • https://cdn.shopify.com/s/files/1/0432/3462/3643/files/sabosizijafusalipibovodiz.pdf
    • https://cdn.shopify.com/s/files/1/0431/5129/4619/files/blockchain_revolution_espaol.pdf
    • https://cdn.shopify.com/s/files/1/0437/4190/5045/files/wowapamol.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006ae3.bin
693a4a239c98ce208c673882fbe1b8a8a747548df35752b5114ef3f33b41f1d9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6AE3 5200 bytes
font_01_sfnt_off00007c50.bin
9dc95fb550c4b197e25854d367371f06f310e178276ccc0ae04afdc76500db32		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7C50 14116 bytes
font_02_sfnt_off0000a8a9.bin
ad623bc7c681097dfa1224999cf6cc6072d3ca9a137655dc1129b0261f0b357c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA8A9 4324 bytes

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