Malicious PDF — malware analysis report

Static analysis result for SHA-256 a2cec4a014c4176c…

MALICIOUS

PDF

42.8 KB Created: 2020-09-01 22:13:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d3e4524cd6af9336ab934feaec54f8ce SHA-1: 11bd8d6dfe9981fe3a2f7201ed6852117a22e3b3 SHA-256: a2cec4a014c4176cd62a11f380013a90413e8b659e4b9081ff92d5ce4d5786ba
152 Risk Score

Malware Insights

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

The PDF contains a link farm and a prominent malicious redirector URL, 'https://ttraff.me/wix?keyword=chandigarh+police+ddr+report', disguised as a police report. The ML classifier strongly indicated maliciousness. The document body, though heavily obfuscated, contains the malicious URL and references to other PDF files, suggesting a lure to external content.

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=chandigarh+police+ddr+report
    • https://static.usrfiles.com/ugd/8e1900_9c7fc94f14c74e8db43cc75e993c21a2.pdf
    • https://static.usrfiles.com/ugd/79cb75_5a617b4bb9c64501ae5fd9a60540e51b.pdf
    • https://static.usrfiles.com/ugd/3dd68e_f625f6a7e3b54b1c89d00f2c2fa0d67b.pdf
    • https://cdn.shopify.com/s/files/1/0438/2933/0082/files/paduzezevekezakusoneb.pdf
    • https://cdn.shopify.com/s/files/1/0440/5982/0182/files/soundboard_for_vrchat.pdf
    • https://cdn.shopify.com/s/files/1/0430/2376/1571/files/pixelmon_azure_flute.pdf
    • https://cdn.shopify.com/s/files/1/0432/5851/1510/files/cardiologia_pediatrica_myung.pdf
    • https://static.usrfiles.com/ugd/b88e3d_da4525a6a3b64d08847197ff12296678.pdf
    • https://static.usrfiles.com/ugd/b8c837_0d92b88587ee450aaaa20a7ded358862.pdf
    • https://static.usrfiles.com/ugd/4bdc6d_5c59b9d5cb0b4eba96f3c45ebe3a1642.pdf
    • https://static.usrfiles.com/ugd/b8c837_c69bc9f6b1d746459ab5fe9d771c4fa2.pdf
    • https://static.usrfiles.com/ugd/b8c837_ad319baeaa3f4a14b46fe1e02621a7ea.pdf
    • https://static.usrfiles.com/ugd/a467d2_66a0e7f501b5403fb461a2561256f314.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_off00005d0c.bin
89f546f295ace67cb78c9dd9977ebf9a9074f7b57d9135d650899dfb5d04b071
pdf-font-stream PDF embedded font (sfnt) at offset 0x5D0C 4968 bytes
font_01_sfnt_off00006de1.bin
9ec4210051a1442e9d276b1e8a395832d75f8694919be679ae9ed35cfa0b964d
pdf-font-stream PDF embedded font (sfnt) at offset 0x6DE1 10096 bytes
font_02_sfnt_off0000905e.bin
b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c
pdf-font-stream PDF embedded font (sfnt) at offset 0x905E 4324 bytes