Malicious PDF — malware analysis report

Static analysis result for SHA-256 cc3252d0e4ed4ebf…

MALICIOUS

PDF

48.6 KB Created: 2020-08-01 22:59:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f1c3de80f5e5636bd5cd6ccb66a0856d SHA-1: 4686c96bffca242e1b6d4d8b013cbc6a9b1e90e0 SHA-256: cc3252d0e4ed4ebf24e658253e5430cd60a5647548b1cc72fb60768ab9334625
152 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, identified as a link farm, with one specifically pointing to a known malicious redirector at `ttraff.ru`. The document body, though heavily obfuscated, contains text related to a '2012 honda civic owner's manual' and the `wkhtmltopdf` generator, suggesting a lure to disguise the malicious links. 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.ru/pify?keyword=2012+honda+civic+owner%2527+s+manual
    • http://files.eranthelaw.com/uploads/1/3/1/1/131163540/rigiwetekuwe_wamixab.pdf
    • http://files.crashgem.com/uploads/1/3/2/6/132695575/9308211.pdf
    • http://files.skeem125photography.com/uploads/1/3/1/4/131407855/6659451.pdf
    • http://files.utahenglishcreamgoldenretrievers.com/uploads/1/3/0/7/130775021/gasimoxurakomim_solakuteg.pdf
    • http://files.rg4ed.com/uploads/1/3/1/4/131437813/kebijo-sufijap-xanapugoleguna.pdf
    • https://cdn.shopify.com/s/files/1/0431/6315/6641/files/kogitovolajesufixilunoma.pdf
    • https://cdn.shopify.com/s/files/1/0436/7430/4662/files/94727456594.pdf
    • https://cdn.shopify.com/s/files/1/0429/9459/8047/files/kebosoligajaji.pdf
    • https://cdn.shopify.com/s/files/1/0440/0765/3526/files/mudis.pdf
    • https://cdn.shopify.com/s/files/1/0440/3003/4085/files/41399910239.pdf
    • https://cdn.shopify.com/s/files/1/0432/3275/5875/files/zigipurazesodudoririno.pdf
    • https://cdn.shopify.com/s/files/1/0433/0491/1006/files/jugubamusika.pdf
    • https://cdn.shopify.com/s/files/1/0431/1675/7154/files/vevubawaw.pdf
    • https://cdn.shopify.com/s/files/1/0430/7543/6698/files/wipupozodofofuduzazuma.pdf
    • https://cdn.shopify.com/s/files/1/0433/1667/4713/files/68687795146.pdf
    • https://cdn.shopify.com/s/files/1/0430/8136/7712/files/xikudefe.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007212.bin
067ea5946de1eab21d2f51019ca54dcfaa284c56f95f5d33ca5531a9faa6f982		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7212 5396 bytes
font_01_sfnt_off00008441.bin
10bd8203d995932d134d024e3adc03f275dc0862beb9e27457600be9a6e4e2c4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8441 10420 bytes
font_02_sfnt_off0000a768.bin
d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA768 4324 bytes

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