Malicious PDF — malware analysis report

Static analysis result for SHA-256 f3f00bc88b27380f…

MALICIOUS

PDF

43.8 KB Created: 2020-08-24 18:57:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 012bf1c3e9d50393a52da9dcce00581a SHA-1: 9f9a50ec580a9f5832180c7209a4ac9a8b8f4e27 SHA-256: f3f00bc88b27380fc85a9d2c5d6219c9d887b8db08d58b883cc82c1e42dde89e
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a mass of external links, many pointing to Shopify domains, but one critical link redirects to a known malicious domain (ttraff.com). The document body, though heavily obfuscated, contains the malicious URL, suggesting a lure to trick users into clicking it. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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=best+android+studio+learning+videos
    • http://files.bigtrecreation.com/uploads/1/3/1/3/131379612/fasezojozixuf.pdf
    • http://files.alphaphicsueb.com/uploads/1/3/1/1/131164488/xovuvalulov_panudu_papikib.pdf
    • https://cdn.shopify.com/s/files/1/0431/1007/2481/files/hirth_f-_33.pdf
    • https://cdn.shopify.com/s/files/1/0435/3140/3423/files/bcs_business_analysis_foundation_book.pdf
    • https://cdn.shopify.com/s/files/1/0431/3730/2679/files/arc_back_pain_exercises.pdf
    • https://cdn.shopify.com/s/files/1/0439/4264/1832/files/agricultural_marketing_plan.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/palafasejuzanuz.pdf
    • https://cdn.shopify.com/s/files/1/0433/7221/6483/files/buzigabotimebelo.pdf
    • https://cdn.shopify.com/s/files/1/0430/5630/0186/files/warima.pdf
    • https://cdn.shopify.com/s/files/1/0430/7720/6178/files/plexiform_neurofibromas_in_nf1.pdf
    • https://cdn.shopify.com/s/files/1/0431/2776/7206/files/tumuzu.pdf
    • https://cdn.shopify.com/s/files/1/0433/8565/1358/files/salovejewagakogezerov.pdf
    • https://cdn.shopify.com/s/files/1/0427/7128/4135/files/boborilejizofilogeziketo.pdf
    • https://cdn.shopify.com/s/files/1/0437/3803/8423/files/avery_label_printing_template_5160.pdf
    • https://cdn.shopify.com/s/files/1/0428/6627/8556/files/vureniz.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_off00006dfa.bin
cb313ecf668866fc42c95744cef1545e2b8675f5d61c04e3a5a0a249d211e0b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6DFA 5100 bytes
font_01_sfnt_off00007f64.bin
3c651c45d73d98657043809c29116dfb8a9183118d0b19dae4590fc292310068		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7F64 10284 bytes

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