Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e01396bac85cb8e…

MALICIOUS

PDF

42.6 KB Created: 2020-08-10 10:30:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fd60eb1ea73e0e46e926c9a745413257 SHA-1: b10157be4e342752c47e1b45c3b38017bcb87235 SHA-256: 2e01396bac85cb8e29943399addeee4b6a855c935daeedc5fc9ff0de5697d45a
152 Risk Score

Malware Insights

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

The PDF document contains a large number of embedded links, with one specifically pointing to a known malicious redirector. The ML classifier strongly indicated maliciousness. The document body appears to be malformed or obfuscated, but the presence of the malicious redirector URL and the link farm heuristic suggest the primary intent is to lure users to malicious content or engage in SEO manipulation. No scripts were extracted from this sample.

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.cc/pify?keyword=tropisms+nathalie+sarraute+pdf
    • http://files.engravingheavenlytruths.com/uploads/1/3/1/3/131384127/lofuxiv-jomipagiz.pdf
    • http://files.theloopcenter.com/uploads/1/3/1/8/131856353/39f213bcfe.pdf
    • http://files.goldbergiryami-taxcert.com/uploads/1/3/0/7/130775277/2874932.pdf
    • http://files.palanihills.net/uploads/1/3/1/4/131437649/063272bcadc2.pdf
    • https://cdn.shopify.com/s/files/1/0437/8814/0696/files/96832889083.pdf
    • https://cdn.shopify.com/s/files/1/0434/9159/0308/files/winofakoluzitofiforisuk.pdf
    • https://cdn.shopify.com/s/files/1/0432/8852/7013/files/najas.pdf
    • https://cdn.shopify.com/s/files/1/0428/4016/2467/files/zuwixogomifiloduto.pdf
    • https://cdn.shopify.com/s/files/1/0429/0877/8663/files/ahmedabad_smart_city_proposal.pdf
    • https://cdn.shopify.com/s/files/1/0436/2744/6435/files/pantheon_aram_build.pdf
    • https://cdn.shopify.com/s/files/1/0432/7132/3808/files/donovaboruruputinimidamu.pdf
    • https://cdn.shopify.com/s/files/1/0429/6107/6387/files/6095329796.pdf
    • https://cdn.shopify.com/s/files/1/0432/7620/6240/files/rawamolesibapa.pdf
    • https://cdn.shopify.com/s/files/1/0431/3019/2039/files/68614432262.pdf
    • https://cdn.shopify.com/s/files/1/0432/3786/7687/files/resativ.pdf
    • https://cdn.shopify.com/s/files/1/0437/5740/4318/files/ignou_assignment_first_page.pdf
    • https://cdn.shopify.com/s/files/1/0431/9005/9176/files/9731795617.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_off0000670e.bin
79fca3b391e19aa395c7be6af39a85e74f33d029e3349d67b5469c7147e50f65		 pdf-font-stream PDF embedded font (sfnt) at offset 0x670E 5228 bytes
font_01_sfnt_off000078a3.bin
696ba23984156e2342b4e0992003cf09877fad2da25cbeba6535f95e9698a867		 pdf-font-stream PDF embedded font (sfnt) at offset 0x78A3 10660 bytes

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