Malicious PDF — malware analysis report

Static analysis result for SHA-256 04e5ebe3aa15fce4…

MALICIOUS

PDF

44.8 KB Created: 2020-08-16 17:31:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 63f4e55a3156e9545458414c5d21af73 SHA-1: 2ff8bdf2d556049ce1e0c9d931fe9c55944f3caf SHA-256: 04e5ebe3aa15fce428a8858a90665c74c63c82ad4bfd4dfb13c42ce5fb7a1b82
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic firing for a malicious redirector at 'https://ttraff.com/pify?keyword=guitar+chord+template+pdf'. The document body, though heavily obfuscated, also contains this URL, suggesting it's the primary lure. The presence of many external PDF links, some benign and some unknown, indicates a link farm strategy, likely to improve SEO for malicious content or to distribute further payloads. The ML classifier strongly flagged this PDF as malicious.

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/pify?keyword=guitar+chord+template+pdf
    • http://pisago.ckdpc.org/uploads/1/3/2/6/132681231/52c17362.pdf
    • http://mofusilor.carlahope.com/uploads/1/3/1/4/131411688/db529eaf96da.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0435/6934/8763/files/jenetepepumezamigenodilej.pdf
    • https://cdn.shopify.com/s/files/1/0432/6490/1284/files/ragupuzoj.pdf
    • https://cdn.shopify.com/s/files/1/0431/0306/0128/files/55820653306.pdf
    • https://cdn.shopify.com/s/files/1/0431/7039/8372/files/wukase.pdf
    • https://cdn.shopify.com/s/files/1/0428/7699/3702/files/zasajamivafupazeso.pdf
    • https://cdn.shopify.com/s/files/1/0434/7537/0136/files/inlet_guide_vane_fan_curve.pdf
    • https://cdn.shopify.com/s/files/1/0428/5313/8591/files/zumijiluz.pdf
    • https://cdn.shopify.com/s/files/1/0437/1313/4757/files/lovaw.pdf
    • https://cdn.shopify.com/s/files/1/0431/8068/7520/files/pibawafujeximavekilav.pdf
    • https://cdn.shopify.com/s/files/1/0432/2879/0946/files/manifesto_barisan_nasional_pru_14.pdf
    • https://cdn.shopify.com/s/files/1/0435/4002/1407/files/96714701123.pdf
    • https://cdn.shopify.com/s/files/1/0434/5534/8888/files/4398236402.pdf
    • https://cdn.shopify.com/s/files/1/0431/8153/9483/files/vedofiwagonij.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006440.bin
9decbd3da9ca29223b191e5b6638bd6286a237d15b5e90b96651b50acc41339f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6440 5024 bytes
font_01_sfnt_off00007556.bin
0faa9409e1711bbece0c1058f7bf9a40f71a69c0a23f89cb01a633e9881d9629		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7556 10088 bytes
font_02_sfnt_off000097c9.bin
ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230		 pdf-font-stream PDF embedded font (sfnt) at offset 0x97C9 4324 bytes

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