Malicious PDF — malware analysis report

Static analysis result for SHA-256 e8f6956b5b4c1819…

MALICIOUS

PDF

44.3 KB Created: 2020-08-21 22:45:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1ee12888962a4193c8fa3227db7e6eac SHA-1: 8ae0cb68cd5ee4fada1c6c3c2a17c3fd316e2243 SHA-256: e8f6956b5b4c181953001d4c536fb4f8bc3b14f0aee7ba82af822b8915c1eb88
152 Risk Score

Malware Insights

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

The PDF contains a link that redirects to a known malicious infrastructure, specifically ttraff.com. This is further supported by the 'PDF_MALICIOUS_REDIRECTOR_LINK' heuristic. The document also contains a large number of external PDF links, many hosted on Shopify, suggesting a link farm or SEO poisoning tactic. The ML classifier strongly indicated maliciousness. No scripts were extracted, but the primary attack vector appears to be social engineering via a deceptive link.

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/pify?keyword=balanced+scorecard+pdf+indonesia
    • http://jumip.cherryartistics.com/uploads/1/3/2/6/132681647/japipas.pdf
    • http://foxasi.makingpeacelast.com/uploads/1/3/1/4/131438672/5018958.pdf
    • https://cdn.shopify.com/s/files/1/0435/5247/3252/files/66141840564.pdf
    • https://cdn.shopify.com/s/files/1/0438/5626/5376/files/bollywood_actress_wallpaper_hd.pdf
    • https://cdn.shopify.com/s/files/1/0437/2283/4071/files/59986348658.pdf
    • https://cdn.shopify.com/s/files/1/0436/2859/3315/files/kumasoxowir.pdf
    • https://cdn.shopify.com/s/files/1/0437/6156/5850/files/joyce_meyer_battlefield_of_the_mind.pdf
    • https://cdn.shopify.com/s/files/1/0431/5630/8123/files/antardesi_patra.pdf
    • https://cdn.shopify.com/s/files/1/0431/0558/3266/files/lotalaxokoz.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/wifufokamavobopizevotug.pdf
    • https://cdn.shopify.com/s/files/1/0433/7562/4355/files/mamuveru.pdf
    • https://cdn.shopify.com/s/files/1/0435/0381/2773/files/fapalakudise.pdf
    • https://cdn.shopify.com/s/files/1/0432/4950/0315/files/front_desk_job_interview_questions_and_answers.pdf
    • https://cdn.shopify.com/s/files/1/0428/5107/4214/files/xixawugadugomojule.pdf
    • https://cdn.shopify.com/s/files/1/0434/9011/5748/files/learning_german_alphabet.pdf
    • https://cdn.shopify.com/s/files/1/0431/3609/0267/files/82012149266.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_off00006ffa.bin
a7ec42655eebb1660de9354b06ed4e06d92c8b30ca7264fe374f9639d8b622f4
pdf-font-stream PDF embedded font (sfnt) at offset 0x6FFA 5200 bytes
font_01_sfnt_off000081af.bin
89274839ea17520586962c22be21b0ee7f0d097e7e52a24372937de1a8f4c0a8
pdf-font-stream PDF embedded font (sfnt) at offset 0x81AF 10020 bytes