Malicious PDF — malware analysis report

Static analysis result for SHA-256 31c338722ef5180f…

MALICIOUS

PDF

40.7 KB Created: 2020-09-07 11:52:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 032c0f9e1e15840fbba0ffc3e233f038 SHA-1: c6c6ab262d90cd52d11c9c0cc5239aa777ce556e SHA-256: 31c338722ef5180fdc79c6fc3cc397cf77fcd94e8fd4bc58be3d2d000d962417
150 Risk Score

Malware Insights

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

The PDF contains a mass external link farm, with one critical link pointing to a known malicious redirector infrastructure. The document body, though heavily obfuscated, contains text related to 'Apple earnings report live' and the malicious redirector URL, suggesting a lure to a phishing or malware distribution site. 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.me/pify?keyword=apple+earnings+report+live
    • https://cdn.shopify.com/s/files/1/0429/4970/5881/files/fejuxuzosuvitoxugafejov.pdf
    • https://cdn.shopify.com/s/files/1/0463/4650/2306/files/setodafizusomogobewujetef.pdf
    • https://cdn.shopify.com/s/files/1/0433/7192/1571/files/wesitetu.pdf
    • https://cdn.shopify.com/s/files/1/0435/3196/0469/files/eros_international_plc_annual_report_2017.pdf
    • https://static.usrfiles.com/ugd/6846fe_405ed552d41c4273b8846975c7499373.pdf
    • https://static.usrfiles.com/ugd/353d00_19a329767d864b0e929254304a884937.pdf
    • https://cdn.shopify.com/s/files/1/0459/7055/5047/files/55407000386.pdf
    • https://cdn.shopify.com/s/files/1/0433/7595/2030/files/mubogitimo.pdf
    • https://cdn.shopify.com/s/files/1/0440/7400/8741/files/24669709473.pdf
    • https://cdn.shopify.com/s/files/1/0437/9285/9293/files/my_little_pony_friendship_is_magic_fanfiction.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_off00006094.bin
8675d14ad2c9bc166272a2e27976af3983b17f44aa10a1e80fa680c86d998772		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6094 5036 bytes
font_01_sfnt_off000071ca.bin
fa064c864bbd39a3852cba7bed9c550bc2aff08e14fd4ef6daa4bf4bbc1d261e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x71CA 10816 bytes

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