Malicious PDF — malware analysis report

Static analysis result for SHA-256 6fa8e946d090ecd8…

MALICIOUS

PDF

56.6 KB Created: 2020-08-12 01:48:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: aac00c99a31c6fd9809eb99dbe35291f SHA-1: 3cbc7082b895cf0f328b7be72a02a1b53d39551d SHA-256: 6fa8e946d090ecd80895c41ad5f5ac869f0205d5b113dd6bd82b3064b8847965
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, specifically pointing to 'ttraff.cc'. This URL is presented within the document body, disguised as a report, indicating a likely phishing or malware distribution attempt. The presence of numerous other external PDF links, many hosted on Shopify, suggests a link farm strategy to obscure the malicious destination. No scripts were extracted, but the primary malicious indicator is the redirector URL.

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=scarman%20report%201981%20pdf
    • http://files.annaengels.com/uploads/1/3/0/9/130969061/4767265.pdf
    • http://files.olympickennelclub.com/uploads/1/3/1/3/131398008/f3aaf366998b9f9.pdf
    • http://dosekuj.melissahamiltonphotography.com/uploads/1/3/2/8/132816066/4625638.pdf
    • http://files.mnvetsoutdoors.org/uploads/1/3/1/4/131408572/lenegudut_xevofokofubo.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/2143/4005/files/teorias_del_origen_de_la_vida_biogenesis.pdf
    • https://cdn.shopify.com/s/files/1/0433/6749/7880/files/bsc_nursing_entrance_exam_question_papers_2020_download.pdf
    • https://cdn.shopify.com/s/files/1/0437/9312/1442/files/simple_present_exercises_cambridge.pdf
    • https://cdn.shopify.com/s/files/1/0431/5670/1346/files/28231451436.pdf
    • https://cdn.shopify.com/s/files/1/0434/4171/7414/files/bfs_and_dfs.pdf
    • https://cdn.shopify.com/s/files/1/0430/5177/8202/files/33147413963.pdf
    • https://cdn.shopify.com/s/files/1/0434/0147/8307/files/cours_affaires_rglementaires_pharmaceutiques.pdf
    • https://cdn.shopify.com/s/files/1/0430/3850/7169/files/7034594263.pdf
    • https://cdn.shopify.com/s/files/1/0440/8344/5925/files/tajemaxomarivunopo.pdf
    • https://cdn.shopify.com/s/files/1/0431/4647/7725/files/zebubimeduwolosofesil.pdf
    • https://cdn.shopify.com/s/files/1/0438/2529/9613/files/najisuweritupawonugazege.pdf
    • https://cdn.shopify.com/s/files/1/0438/1832/0034/files/pagajoven.pdf
    • https://cdn.shopify.com/s/files/1/0428/7679/7081/files/61148432158.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_off00009fc9.bin
91b095902b618e0f35bf223655534934fd88a63b86e8f0fd256328890a157b1b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9FC9 5596 bytes
font_01_sfnt_off0000b2b7.bin
fd7b7cec495ec6ca085b7a453ce0654011dd95a2aab12560791375c9f0285516		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB2B7 10240 bytes

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