Malicious PDF — malware analysis report

Static analysis result for SHA-256 6015fa325dd1f0fd…

MALICIOUS

PDF

33.6 KB Created: 2020-08-08 02:20:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0187f2606122ec03b026509202e40b25 SHA-1: 7fd2f0f6ba1a51701121ee3d9aa8608d86454d9f SHA-256: 6015fa325dd1f0fdaba535b51cb8e4d8cafb51f92b1ce7000a401ba6ba73e242
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm and a malicious redirector URL, disguised as a bearing catalogue. The ML classifier strongly indicated maliciousness. The primary IOC is the redirector URL, which likely leads to a malicious payload or phishing page.

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.cc/pify?keyword=bmg+bearing+catalogue+pdf
    • http://files.quantumarabians.com/uploads/1/3/1/4/131453215/601b62e415b4bf.pdf
    • http://files.theartofalainponcelet.com/uploads/1/3/2/7/132741169/9636384.pdf
    • http://files.tourism.myosceolachamber.org/uploads/1/3/1/4/131453054/jegititufavat_fawugife_notasixu_jafipakor.pdf
    • http://files.flaggdesign.com/uploads/1/3/1/8/131856162/e3316.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0429/8162/1919/files/fewusowuj.pdf
    • https://cdn.shopify.com/s/files/1/0451/1835/7669/files/brass_birmingham_board_game_rules.pdf
    • https://cdn.shopify.com/s/files/1/0431/7049/6672/files/neoplasia_renal.pdf
    • https://cdn.shopify.com/s/files/1/0428/3092/1895/files/tipos_de_reproduccion_animal.pdf
    • https://cdn.shopify.com/s/files/1/0440/7207/5414/files/62736910415.pdf
    • https://cdn.shopify.com/s/files/1/0427/7328/2983/files/jatov.pdf
    • https://cdn.shopify.com/s/files/1/0429/5471/9395/files/tivafodowatewoputa.pdf
    • https://cdn.shopify.com/s/files/1/0437/6192/6293/files/s10_v8_conversion_manual_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0437/0438/5690/files/12550818134.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/96626323422.pdf
    • https://cdn.shopify.com/s/files/1/0434/0026/5878/files/17356871635.pdf
    • https://cdn.shopify.com/s/files/1/0433/0081/5006/files/96460250348.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004538.bin
f655dfa485714a40e6df822062e032488d9d71ac195000e060322db29b64d6a2
pdf-font-stream PDF embedded font (sfnt) at offset 0x4538 5488 bytes
font_01_sfnt_off000057c8.bin
b282cced4b9e196d8e626f51041a27328ac95be33c775770ef30306c45676c4c
pdf-font-stream PDF embedded font (sfnt) at offset 0x57C8 10032 bytes