Malicious PDF — malware analysis report

Static analysis result for SHA-256 9c4bd86d8b57e60e…

MALICIOUS

PDF

48.2 KB Created: 2020-09-09 21:40:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: eae30da429b693f74315e333ccd3e2c1 SHA-1: e3b60ae376f3840c57742c48e70c9a9419f3a0cc SHA-256: 9c4bd86d8b57e60e3d80e218d6811277004f2db6b29f0e29acfd50d64f6014c3
154 Risk Score

Malware Insights

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

The PDF contains a prominent link disguised as 'cadette budgeting badge requirements pdf' which redirects to a malicious URL. The PDF also exhibits characteristics of a link farm, with numerous embedded URLs pointing to various PDF files, suggesting a broad distribution or SEO poisoning tactic. The ML classifier strongly indicated maliciousness, supporting the conclusion that this is a phishing or redirection attempt.

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.me/wix?keyword=cadette+budgeting+badge+requirements+pdf
    • http://nimolo.barefoottofino.com/uploads/1/3/2/7/132741009/8569925.pdf
    • http://retiti.stpetersaratoga.com/uploads/1/3/1/4/131406893/zulazo.pdf
    • http://files.lespals.org/uploads/1/3/1/6/131636941/5806d5f0.pdf
    • http://files.standuprasash.com/uploads/1/3/0/7/130776724/lipigekopo_bodik.pdf
    • https://cdn.shopify.com/s/files/1/0440/2947/7014/files/full_movie_free_online.pdf
    • https://cdn.shopify.com/s/files/1/0438/4748/3552/files/70013317342.pdf
    • https://cdn.shopify.com/s/files/1/0432/9072/2469/files/85295410342.pdf
    • https://cdn.shopify.com/s/files/1/0437/6051/7269/files/chemical_formulas_list_for_class_10.pdf
    • https://static.usrfiles.com/ugd/516574_8abd6372fcac4a9eb3f8547cfef433b7.pdf
    • https://static.usrfiles.com/ugd/bf07b1_d7913b229c8c4a8ca3000d76e1759651.pdf
    • https://static.usrfiles.com/ugd/917232_040137b8e8e14fdcb11d331d88a04b7b.pdf
    • https://cdn.shopify.com/s/files/1/0433/0009/4112/files/234354743.pdf
    • https://cdn.shopify.com/s/files/1/0437/7185/5002/files/i_tc_thn_thit_ting_anh.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_off00007d65.bin
51b5f05b894aaf3a35d1a1bc5c766728da9e6f9d9f5a38ab567d5f44958ab08a
pdf-font-stream PDF embedded font (sfnt) at offset 0x7D65 5500 bytes
font_01_sfnt_off00008fee.bin
cf0f34923491be92739e632e39349f57cb10a3701d573fd186244ee78b44f802
pdf-font-stream PDF embedded font (sfnt) at offset 0x8FEE 10596 bytes