Malicious PDF — malware analysis report

Static analysis result for SHA-256 59029497e0c90d8b…

MALICIOUS

PDF

41.7 KB Created: 2020-08-23 14:08:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ccd479482630730d7ab313262db62afd SHA-1: 35a702e1cfb11d9b6a3603a2cb2026f6dd0583de SHA-256: 59029497e0c90d8b9b51c31d63559d5684b01104f9c93ca19c578a0a12dbd8eb
152 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with one identified as a malicious redirector pointing to 'https://ttraff.com/pify?keyword=google+sheet+select+date'. This suggests a phishing or malware delivery attempt. The presence of a large number of external PDF links, many hosted on cdn.shopify.com, indicates a link farm strategy, likely to improve SEO for malicious content or to obscure the final destination. The ML classifier strongly supports the malicious nature of this PDF.

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=google+sheet+select+date
    • http://kokedudej.diamondlightworld.net/uploads/1/3/1/1/131164250/3040af20610a0.pdf
    • http://files.cottontownship.net/uploads/1/3/1/4/131438477/kaxalifune.pdf
    • http://pofoxaro.undertheskynews.org/uploads/1/3/1/3/131384401/2859807.pdf
    • https://cdn.shopify.com/s/files/1/0433/7316/6744/files/zujotaxobebularizetun.pdf
    • https://cdn.shopify.com/s/files/1/0431/1908/3677/files/ma5156_applied_mathematics_for_engineers_notes.pdf
    • https://cdn.shopify.com/s/files/1/0431/6784/2459/files/borilowekupe.pdf
    • https://cdn.shopify.com/s/files/1/0431/1403/7397/files/zokabimijunetixopewigoxex.pdf
    • https://cdn.shopify.com/s/files/1/0428/7486/3772/files/broselow_pediatric_emergency_tape.pdf
    • https://cdn.shopify.com/s/files/1/0445/3462/8516/files/jiwuwixopimobafimevozepeb.pdf
    • https://cdn.shopify.com/s/files/1/0437/3377/8597/files/zipibegefimewaxobebopeguv.pdf
    • https://cdn.shopify.com/s/files/1/0433/8253/8403/files/52380566307.pdf
    • https://cdn.shopify.com/s/files/1/0433/6625/2703/files/xanokuwaputonatef.pdf
    • https://cdn.shopify.com/s/files/1/0432/4818/9603/files/zumilu.pdf
    • https://cdn.shopify.com/s/files/1/0431/2816/0420/files/nudasujisofunudej.pdf
    • https://cdn.shopify.com/s/files/1/0431/4628/1120/files/6._snf_sosyal_bilgiler_testi.pdf
    • https://cdn.shopify.com/s/files/1/0438/1753/3597/files/pemoninifazat.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_off0000653b.bin
61376cba392d8f6c9333cd2538b7263bd33576c4d8d47df2a56bcb625b1a6f7b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x653B 5136 bytes
font_01_sfnt_off000076b2.bin
cb59da62e7d673671c637d6250b20ecf4c106287cfee1301ce6bbf56add1b252		 pdf-font-stream PDF embedded font (sfnt) at offset 0x76B2 10352 bytes

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