Malicious PDF — malware analysis report

Static analysis result for SHA-256 0f5675e2ef22001a…

MALICIOUS

PDF

83.2 KB Created: 2020-08-30 00:58:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 830057b85b99179a3f81726385e5be59 SHA-1: 31dcb74695e6ff42e4d081f7bf8212deb37b0845 SHA-256: 0f5675e2ef22001a0d9fe11bd86f97a30709b1d11b379c489ac0a934320d80de
154 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link pointing to 'ttraff.club', which is also listed as an IOC. The document body, though heavily obfuscated, contains the same URL, suggesting it's the primary lure. The presence of numerous other Shopify links, while marked as benign, indicates a potential link farm strategy. The ML classifier strongly flagged this PDF as malicious.

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.club/wix?keyword=bluest+eye+summary+pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0431/1043/2930/files/bokeh_brush_photoshop_free.pdf
    • https://cdn.shopify.com/s/files/1/0437/0078/1208/files/vipugibizefepekatemozove.pdf
    • https://cdn.shopify.com/s/files/1/0428/4655/2230/files/kelabizixaxep.pdf
    • https://cdn.shopify.com/s/files/1/0431/6292/7253/files/d_d_5e_character_spell_sheet_download.pdf
    • https://cdn.shopify.com/s/files/1/0434/4256/9382/files/mupelufuzezomovowoxog.pdf
    • https://cdn.shopify.com/s/files/1/0429/7415/0809/files/50027467442.pdf
    • https://cdn.shopify.com/s/files/1/0429/5265/5002/files/habitos_alimentarios_en_adolescentes.pdf
    • https://cdn.shopify.com/s/files/1/0439/7400/0798/files/32085333680.pdf
    • https://cdn.shopify.com/s/files/1/0434/5187/5494/files/vixonolofagenofusavejasav.pdf
    • https://cdn.shopify.com/s/files/1/0432/4599/4146/files/89358178442.pdf
    • https://cdn.shopify.com/s/files/1/0448/4608/8349/files/ricoh_aficio_mp_201spf_manual.pdf
    • https://static.usrfiles.com/ugd/e2c250_ec6bb67941d0406597ce30d1aefd7bde.pdf
    • https://static.usrfiles.com/ugd/b8c837_0ad5dce24a5841b0bfda3ac696c1c899.pdf
    • https://static.usrfiles.com/ugd/7f46b5_2c8256bb7582417da2d8080e51a6e6ce.pdf
    • https://static.usrfiles.com/ugd/0e9fc2_5e746ab3e7274e8ebd60554f0aec35a8.pdf
    • https://static.usrfiles.com/ugd/b8c837_9977ba73851845d7a55f34bee9c89297.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fcce.bin
89d41c55a6861b8d3f5273ff6bbe0663b103c2c6e0981a44110d3824f1b85265		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFCCE 4956 bytes
font_01_sfnt_off00010dac.bin
9f8ad121ff126f642cbfe0392d49d4511581162413b61a093e08b3e53b0fbda1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10DAC 10376 bytes
font_02_sfnt_off0001313b.bin
05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1313B 4324 bytes

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