Malicious PDF — malware analysis report

Static analysis result for SHA-256 d32f01031fd33d44…

MALICIOUS

PDF

50.8 KB Created: 2020-07-31 08:05:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3199dfe52f2cbe1099e8509099a4fb40 SHA-1: b167b398e70630ddfbc4b994a23674ba99370742 SHA-256: d32f01031fd33d440740b7f46aa84b83f44ccb58766264cf903bd175f0aac299
152 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link pointing to 'ttraff.com', which is known for distributing malicious content. The document body, though heavily obfuscated, appears to be a lure related to workout charts, likely to entice users to click the embedded link. The presence of numerous external PDF links, many hosted on Shopify, suggests a link farm designed to improve SEO for malicious content or to obscure the true destination. 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=abs+workout+chart+pdf
    • http://files.nodaysoffalthletics.com/uploads/1/3/1/4/131455832/xesumiwutixilopaduj.pdf
    • http://files.deafcatholicjoliet.org/uploads/1/3/1/4/131438241/fbb671.pdf
    • http://files.louisvillecebs.org/uploads/1/3/0/7/130739284/b9484a9761aad.pdf
    • http://files.northsidepromenaders.com/uploads/1/3/2/6/132696598/kijupezikuvab-tasuruluwafiv-bajofed.pdf
    • http://files.pinkyminkcollection.com/uploads/1/3/0/8/130814157/5757419.pdf
    • https://cdn.shopify.com/s/files/1/0437/5560/2078/files/15283376823.pdf
    • https://cdn.shopify.com/s/files/1/0438/3752/2082/files/19628539883.pdf
    • https://cdn.shopify.com/s/files/1/0428/5900/4070/files/58068170967.pdf
    • https://cdn.shopify.com/s/files/1/0438/2441/4882/files/46603777275.pdf
    • https://cdn.shopify.com/s/files/1/0430/0950/7487/files/64272776162.pdf
    • https://cdn.shopify.com/s/files/1/0437/2063/8632/files/1586470981.pdf
    • https://cdn.shopify.com/s/files/1/0427/4742/9031/files/48510334626.pdf
    • https://cdn.shopify.com/s/files/1/0434/4171/7414/files/47273206742.pdf
    • https://cdn.shopify.com/s/files/1/0428/0261/0335/files/sedeviwadameb.pdf
    • https://cdn.shopify.com/s/files/1/0431/8615/9767/files/fexifalufunelavosino.pdf
    • https://cdn.shopify.com/s/files/1/0436/1070/1981/files/42735776526.pdf
    • https://cdn.shopify.com/s/files/1/0431/4896/8090/files/32247474095.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_off000089f6.bin
06a0afbfe69a9d9c98da2076662debc528b902baca60a9354f91a1e6ea567a76		 pdf-font-stream PDF embedded font (sfnt) at offset 0x89F6 5104 bytes
font_01_sfnt_off00009b65.bin
5e3898464dc8ea63382e204efaeb67f99a5bdb4dcdc8b72ac1aa2104908c53e4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9B65 10136 bytes

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