Malicious PDF — malware analysis report

Static analysis result for SHA-256 47c9a95cc465d6b3…

MALICIOUS

PDF

69.9 KB Created: 2020-08-29 22:07:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d7842c35ab55ebe9f203603f61f44374 SHA-1: 7331a7ca0e95130ff03bec1d615ef7abed189e24 SHA-256: 47c9a95cc465d6b31b8dcb0ba9a7980c0c5df30e4ada0d02e90e906c9836c168
152 Risk Score

Malware Insights

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

The PDF was flagged for containing a mass external PDF link farm and a link to known malicious redirector infrastructure. The document body contains a URL that points to a malicious redirector, which is likely intended to lead the user to a phishing or malware distribution site. The ML classifier also strongly indicated maliciousness.

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.com/wix?keyword=germogli+di+sposa+in+pakistan
    • https://static.usrfiles.com/ugd/b8c837_ed426657fc0c469bba22da7019b26597.pdf
    • https://static.usrfiles.com/ugd/b8c837_3bb1240c36df4070a09f433bd2f94fb8.pdf
    • https://static.usrfiles.com/ugd/b8c837_b644774a7460409fb246c2c0605552bb.pdf
    • https://static.usrfiles.com/ugd/b8c837_50013010c18e477f8e551885bd23c3ea.pdf
    • https://cdn.shopify.com/s/files/1/0430/5082/7929/files/faliza.pdf
    • https://cdn.shopify.com/s/files/1/0436/1352/0029/files/pebizupa.pdf
    • https://cdn.shopify.com/s/files/1/0434/6655/5556/files/gibbs_adsorption_isotherm.pdf
    • https://cdn.shopify.com/s/files/1/0433/4750/9416/files/65946232623.pdf
    • https://cdn.shopify.com/s/files/1/0434/1678/0956/files/89910305334.pdf
    • https://static.usrfiles.com/ugd/b8c837_6b386d4fea1f4f8880ee482204dfd440.pdf
    • https://static.usrfiles.com/ugd/286fb8_6bc104bee6e14c1ba6298c83b7afb955.pdf
    • https://static.usrfiles.com/ugd/b8c837_942c5375e538440f8284ddcaf11f1afd.pdf
    • https://static.usrfiles.com/ugd/b8c837_e0120433f8ed46b1b7e740f4ad7a52f0.pdf
    • https://static.usrfiles.com/ugd/cc03df_55ca156cd9d04ec8becca21a80800506.pdf
    • https://static.usrfiles.com/ugd/b8c837_5f3315c5e7464f1bb0f3d6fda657370a.pdf
    • https://static.usrfiles.com/ugd/b8c837_82dbe24541994cccb731040fab8ba8dc.pdf
    • https://static.usrfiles.com/ugd/b8c837_06e553633be34dd69e42749317fc52fc.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
stream_006_off0000dfdb.bin
a641cd0418ed6148491757eb9c498c436d32e4d584abcbe24b1630e6a924cb14		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0xDFDB 24524 bytes
font_00_sfnt_off0000a6ef.bin
86704c537ce5de1f40ce177790c5ca7c06f54e6a4ae3e858a3be713ab4e4d1a0		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA6EF 5372 bytes
font_01_sfnt_off0000b928.bin
3fbfc5112ef640a766de0f475f9bc20ba04d71604adace4b973635fd8d354240		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB928 12520 bytes

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