Malicious PDF — malware analysis report

Static analysis result for SHA-256 154f406a0cb728f6…

MALICIOUS

PDF

42.1 KB Created: 2020-08-01 22:56:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4b9d1c4e302d557232c7f7d71ca1ab6a SHA-1: 5adcb52943a90cbd26ece8704fb25595d9ea2f39 SHA-256: 154f406a0cb728f6804d0044fce85b1df10ca6c06749b91f981e9159555c00d2
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, many of which point to a redirector service known to host malicious content. The document body, though obfuscated, contains references to a 'mobility scooter manual' and includes the malicious URL, suggesting a lure to trick users into visiting potentially harmful sites. The ML classifier also strongly indicated maliciousness.

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.ru/pify?keyword=pride+mobility+scooter+manual
    • http://files.myflicktv.com/uploads/1/3/1/4/131409693/banuwuxabazot.pdf
    • http://files.vbccooleemee.com/uploads/1/3/2/3/132303378/xigof.pdf
    • http://files.dietrichleisimages.com/uploads/1/3/1/4/131406841/60acfe27.pdf
    • http://files.iwstreecare.com/uploads/1/3/2/7/132740479/wogupu-zukokitoruwogog-zikezugufada-pubuzesilas.pdf
    • http://files.elsolmarketing.com/uploads/1/3/0/7/130739456/losufax-futenixe-futikidufoxari-ketegejovet.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/2226/2178/files/40707309032.pdf
    • https://cdn.shopify.com/s/files/1/0429/2778/4099/files/73547262163.pdf
    • https://cdn.shopify.com/s/files/1/0431/6450/0134/files/niwenu.pdf
    • https://cdn.shopify.com/s/files/1/0429/9957/8773/files/21712671309.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/ruwisosipopiwusanitilowaz.pdf
    • https://cdn.shopify.com/s/files/1/0434/7055/3250/files/radalejozaxinoseluvo.pdf
    • https://cdn.shopify.com/s/files/1/0429/5891/3689/files/18552628348.pdf
    • https://cdn.shopify.com/s/files/1/0430/3667/2162/files/tezatarokusumiz.pdf
    • https://cdn.shopify.com/s/files/1/0428/4314/4359/files/37068026358.pdf
    • https://cdn.shopify.com/s/files/1/0429/3463/2607/files/66198950952.pdf
    • https://cdn.shopify.com/s/files/1/0438/0377/1041/files/pesetog.pdf
    • https://cdn.shopify.com/s/files/1/0437/2021/2645/files/40613676331.pdf
    • https://cdn.shopify.com/s/files/1/0433/4501/9035/files/vedosorasefogeke.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000065b2.bin
0c89b47c3eae7912850002c513d405c4f0310ae1906943c9d58aa97b3c1d1043		 pdf-font-stream PDF embedded font (sfnt) at offset 0x65B2 5328 bytes
font_01_sfnt_off000077b7.bin
a0ca375e881fb00b7a0a90964ca803ff0eba591e58ac121a388b5eb284b4308f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x77B7 10576 bytes

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