Malicious PDF — malware analysis report

Static analysis result for SHA-256 c6d808449473f16a…

MALICIOUS

PDF

73.5 KB Created: 2020-08-31 09:17:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f9e2fec5c73b27c2ef61e1d13d5dc1ba SHA-1: a412b95db8f834865e9ddd7ec588f2fce6213763 SHA-256: c6d808449473f16ac001ca9f47e97546ff04accb288c4b2e5cbdfe622fb78d6f
152 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by a machine learning classifier and contains a critical heuristic indicating a link to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains the URL that triggered this finding. The primary intent appears to be directing users to the malicious URL.

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.ru/wix?keyword=lifespan+of+a+pekingese+dog
    • https://static.usrfiles.com/ugd/b8c837_efecfac215454b0e9be89bf658fd3c9b.pdf
    • https://static.usrfiles.com/ugd/b8c837_e3c5f7b5177842d1a8af5e3d7de42d29.pdf
    • https://static.usrfiles.com/ugd/93971e_88c8b82f071c4f2aab874d57b43831e4.pdf
    • https://cdn.shopify.com/s/files/1/0459/9277/1741/files/adding_decimals_worksheet_6th_grade.pdf
    • https://cdn.shopify.com/s/files/1/0437/3656/3866/files/hair_stylist_resume.pdf
    • https://cdn.shopify.com/s/files/1/0433/5419/4085/files/81574258815.pdf
    • https://cdn.shopify.com/s/files/1/0428/9999/6839/files/badagry_history.pdf
    • https://static.usrfiles.com/ugd/b8c837_c692caf4a0a64d8ca1ba09c60602eacc.pdf
    • https://static.usrfiles.com/ugd/b8c837_c02035af460e4bfc92c6e51eb577c4a0.pdf
    • https://static.usrfiles.com/ugd/764aaa_0c1b351c84634b0cb288e29efdbde0cc.pdf
    • https://static.usrfiles.com/ugd/1c90dc_3550c71f752549a7940fa5705110304b.pdf
    • https://cdn.shopify.com/s/files/1/0434/1432/3356/files/muvusesimejixopadovepez.pdf
    • https://cdn.shopify.com/s/files/1/0431/4329/9234/files/97512541217.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_off0000d761.bin
0a352dad2df71c3fd6eaabf65e422076426bb6d7c42e90f5cab2b444cea7a0e2
pdf-font-stream PDF embedded font (sfnt) at offset 0xD761 4796 bytes
font_01_sfnt_off0000e7c0.bin
c27d002b8f49ad72982150d812e2b9e408d6da074512392ecda399fb70009b22
pdf-font-stream PDF embedded font (sfnt) at offset 0xE7C0 10352 bytes
font_02_sfnt_off00010b1c.bin
1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361
pdf-font-stream PDF embedded font (sfnt) at offset 0x10B1C 4324 bytes