Malicious PDF — malware analysis report

Static analysis result for SHA-256 04fd9464794e5207…

MALICIOUS

PDF

39.1 KB Created: 2020-08-10 03:32:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c2346d49ade4a4fc506640160656dcb4 SHA-1: 09cdc66bb1ca8fb16fd3c9c403fb7487b36410ff SHA-256: 04fd9464794e5207ea6c2f4eac62053430d5d8e479e157dddc7300865012a1ef
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a critical heuristic firing for linking to known malicious redirector infrastructure, specifically 'ttraff.com'. The document body and embedded links also indicate a lure to unlock a secured PDF, which is a common social engineering tactic. The presence of numerous external PDF links suggests a link farm used to distribute malicious content or improve SEO for malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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/pify?keyword=unlock+secured+pdf+foxit+reader
    • http://files.nod-production.de/uploads/1/3/0/7/130776118/3864674.pdf
    • http://files.voiceofgreg.com/uploads/1/3/2/7/132710491/5612914.pdf
    • http://files.vtfarmshow.com/uploads/1/3/2/7/132712093/4025758.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/6504/0282/files/19372302649.pdf
    • https://cdn.shopify.com/s/files/1/0429/6887/5157/files/39781256091.pdf
    • https://cdn.shopify.com/s/files/1/0429/6399/2742/files/318247235.pdf
    • https://cdn.shopify.com/s/files/1/0428/7738/6918/files/67787857713.pdf
    • https://cdn.shopify.com/s/files/1/0428/4815/7859/files/94484709459.pdf
    • https://cdn.shopify.com/s/files/1/0433/3276/3801/files/14218008905.pdf
    • https://cdn.shopify.com/s/files/1/0431/9258/2293/files/definicion_de_catabolismo_y_anabolismo.pdf
    • https://cdn.shopify.com/s/files/1/0435/8812/4835/files/mesulufupoza.pdf
    • https://cdn.shopify.com/s/files/1/0428/5222/1084/files/3807600349.pdf
    • https://cdn.shopify.com/s/files/1/0430/3486/9909/files/actualtests_cissp.pdf
    • https://cdn.shopify.com/s/files/1/0431/1236/6229/files/mitebiziguv.pdf
    • https://cdn.shopify.com/s/files/1/0429/0743/5167/files/pitejozojinupenesezigenuk.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005c27.bin
3abd500eb4fb7efebf6f2c6ee3eeb490bc8abead2968ad545b88761376e14fac		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5C27 5272 bytes
font_01_sfnt_off00006e2c.bin
0b7b6fa908bafcde59549e70d9c60a4512667382aba1e8c8f8735fec7362cb09		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6E2C 9768 bytes

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