Malicious PDF — malware analysis report

Static analysis result for SHA-256 8b45fc2d8562e8d1…

MALICIOUS

PDF

39.3 KB Created: 2020-08-31 08:48:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bb30dabfdb072ba20f9ce7864d0bcb71 SHA-1: 2fa7c93e7e3b29e5245aa3e0b78f8da961fbbc6b SHA-256: 8b45fc2d8562e8d1155543a5c408d1658062bd25fbe32bc4f9cf8492d6957f29
150 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.cc/wix?keyword=kamo+l+agence+babel+questionnaire+le'. This indicates the document's primary purpose is to lure users to a malicious site. The presence of a large number of external PDF links, many hosted on static.usrfiles.com, suggests a link farm or SEO poisoning tactic to distribute the malicious content. No scripts were extracted, but the embedded URL is sufficient to classify this as a malicious redirector.

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.cc/wix?keyword=kamo+l+agence+babel+questionnaire+le
    • https://static.usrfiles.com/ugd/c345b0_507d65a88a84401fb9814af1dacb0d68.pdf
    • https://static.usrfiles.com/ugd/f967ac_728d72fb349949119a5f882059b12ec0.pdf
    • https://static.usrfiles.com/ugd/0dcf4b_813e22df97f140e7af8540c52d27bafe.pdf
    • https://static.usrfiles.com/ugd/162fe6_78e7f7d43bea4e29a61c6faa6ac0d143.pdf
    • https://static.usrfiles.com/ugd/b8c837_afbed4158d894d2b9c736ce5648a1a09.pdf
    • https://static.usrfiles.com/ugd/4d935e_6e4af42724294db4bcd75041d1e54024.pdf
    • https://static.usrfiles.com/ugd/b8c837_8c206f1c44d043f999a4bb4ab4a159e7.pdf
    • https://static.usrfiles.com/ugd/b8c837_0160fc993db34c7eb2f1e115e230068b.pdf
    • https://cdn.shopify.com/s/files/1/0428/5235/2156/files/fipasafabinawugosim.pdf
    • https://cdn.shopify.com/s/files/1/0447/4676/8533/files/princeton_review_mcat_student_guide.pdf
    • https://cdn.shopify.com/s/files/1/0431/2884/8538/files/bedroom_3d_wallpaper.pdf
    • https://cdn.shopify.com/s/files/1/0430/6989/8914/files/7740553666.pdf
    • https://cdn.shopify.com/s/files/1/0434/1733/8005/files/principios_da_astrologia_vedica.pdf
    • https://cdn.shopify.com/s/files/1/0450/8103/4917/files/viability_gap_funding.pdf
    • https://cdn.shopify.com/s/files/1/0427/5693/1751/files/a_wizard_of_earthsea_summary.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000046cc.bin
5e238ff139b32aa25adc60b2de74843ac1168253cf271fc00820ead3933ebfc6
pdf-font-stream PDF embedded font (sfnt) at offset 0x46CC 5352 bytes
font_01_sfnt_off000058f0.bin
87b2cf947fadeb0d1a0d308d9a28a567afcfe0f5ee1b43ac99fad08b0714f498
pdf-font-stream PDF embedded font (sfnt) at offset 0x58F0 10012 bytes
font_02_sfnt_off00007b54.bin
df1d2c903cabdf2976887e260da0b25217edeb5ce2b71f315001024534e8e210
pdf-font-stream PDF embedded font (sfnt) at offset 0x7B54 16060 bytes