Malicious PDF — malware analysis report

Static analysis result for SHA-256 7bc2ee94ed4cfcf6…

MALICIOUS

PDF

49.8 KB Created: 2020-07-25 01:34:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e1322d9707767e03380949aa9affdfb5 SHA-1: c6cecde2146e304fb2a8cec13a73c2119f4003ad SHA-256: 7bc2ee94ed4cfcf6eda600992a4cddb2266ce4bf53f58a160326e2dca1acf99f
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link T1059.001 PowerShell

The PDF contains a heuristic firing for a malicious redirector link, pointing to 'ttraff.cc'. It also exhibits a PDF link farm behavior, with numerous links pointing to Shopify-hosted PDFs, likely to obscure the malicious redirector. The document body, though heavily obfuscated, contains text related to a 'Bnz covered bond investor report', suggesting a lure for financial-themed phishing. The ML classifier strongly indicates 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.cc/pify?keyword=bnz+covered+bond+investor+report
    • http://files.el-bagel.com/uploads/1/3/1/1/131163834/1219c8b1f4be.pdf
    • http://files.robertlheimall.com/uploads/1/3/1/6/131606923/4a64ffab111806f.pdf
    • http://files.prettylines.com/uploads/1/3/0/7/130739690/c57137aea5a9.pdf
    • http://files.emanuellutheran.org/uploads/1/3/1/0/131070374/sakeluji.pdf
    • http://files.teamfuber.com/uploads/1/3/1/8/131872298/0ed631498b.pdf
    • http://files.prettyline
    • https://cdn.shopify.com/s/files/1/0428/8181/0595/files/pejepomojipizog.pdf
    • https://cdn.shopify.com/s/files/1/0429/6910/4540/files/bazado.pdf
    • https://cdn.shopify.com/s/files/1/0429/5547/3059/files/fewuvawugi.pdf
    • https://cdn.shopify.com/s/files/1/0429/9345/1159/files/22072426338.pdf
    • https://cdn.shopify.com/s/files/1/0429/5095/1066/files/dolenoronakotisi.pdf
    • https://cdn.shopify.com/s/files/1/0434/2287/5813/files/tumogepenepaludosadigone.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/kevesuladufutaniwor.pdf
    • https://cdn.shopify.com/s/files/1/0431/8802/7556/files/66840751562.pdf
    • https://cdn.shopify.com/s/files/1/0436/9865/1288/files/ridepow.pdf
    • https://cdn.shopify.com/s/files/1/0429/6825/2565/files/89940638234.pdf
    • https://cdn.shopify.com/s/files/1/0433/6254/9910/files/peput.pdf
    • https://cdn.shopify.com/s/files/1/0431/5915/8946/files/26230793052.pdf
    • https://cdn.shopify.com/s/files/1/0432/3062/5950/files/muserubuzowadikoje.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_off00007a5d.bin
6858438e194272a2eef883658cf229df85fb0615a7bda88b6e82c2cb03a98ad5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7A5D 4912 bytes
font_01_sfnt_off00008b21.bin
278722206b3eab037e9c50f84d0f2060082bec2816f9735b8fed4c5ce03cdc9a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8B21 14844 bytes

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