Malicious PDF — malware analysis report

Static analysis result for SHA-256 feabbcb56165bdf0…

MALICIOUS

PDF

44.9 KB Created: 2020-08-06 21:35:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cdd009272ce969d4f717686a23a07f18 SHA-1: 8e248587e40d88dd0066cc8b24d5854e68b766cf SHA-256: feabbcb56165bdf005f5261bb2dc3f982bc1f8693442e31013f146b1fe312471
152 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing indicating it links to known malicious redirector infrastructure. The document body text, though heavily obfuscated, contains the primary malicious URL. The presence of a large number of external PDF links, many hosted on Shopify, suggests a link farm designed to obscure the ultimate destination and potentially improve search engine ranking for malicious content.

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=customer+behavior+analysis+pdf
    • http://gazoberu.grand-boats.co.uk/uploads/1/3/0/8/130813765/vovezozibumatiwu.pdf
    • http://tewobom.immortalinquiry.com/uploads/1/3/0/7/130775677/vuteruk_tedemizis_wivevodiv.pdf
    • http://files.beingjewish.net/uploads/1/3/1/3/131383837/ca2ee75d08.pdf
    • http://mivofagid.makwawamalawi.com/uploads/1/3/1/3/131380729/wabokanowejoko.pdf
    • http://files.healingpassions.com/uploads/1/3/0/9/130968988/xorumukutavosajizen.pdf
    • https://cdn.shopify.com/s/files/1/0434/3654/0069/files/13940123217.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/pejuzesuloroxutebed.pdf
    • https://cdn.shopify.com/s/files/1/0440/8888/5413/files/penisapuxegeg.pdf
    • https://cdn.shopify.com/s/files/1/0430/3123/2674/files/konukugafuxawaduremepu.pdf
    • https://cdn.shopify.com/s/files/1/0428/1463/6198/files/jiluzudofosimivuvedalal.pdf
    • https://cdn.shopify.com/s/files/1/0428/6837/5719/files/zifipirirozipigeludeniviz.pdf
    • https://cdn.shopify.com/s/files/1/0434/4987/6630/files/24761851719.pdf
    • https://cdn.shopify.com/s/files/1/0431/1459/4466/files/83072933187.pdf
    • https://cdn.shopify.com/s/files/1/0441/0294/2872/files/bouddhisme_livre.pdf
    • https://cdn.shopify.com/s/files/1/0433/4462/5822/files/90851522769.pdf
    • https://cdn.shopify.com/s/files/1/0439/2307/9323/files/dimotawowupegenin.pdf
    • https://cdn.shopify.com/s/files/1/0437/2961/7057/files/47546038325.pdf
    • https://cdn.shopify.com/s/files/1/0429/4436/4710/files/44730530485.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_off00006fa7.bin
56907910df60f751e840d3aaab064e4c489e9177b473a6734ce5843320da1f36		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6FA7 5488 bytes
font_01_sfnt_off0000822a.bin
538f6e5c618f2eb9e6469f2d9ab708254ebfb61a40028d4ff77403f1324b6ef5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x822A 10504 bytes

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