Malicious PDF — malware analysis report

Static analysis result for SHA-256 a6c842751a8135c9…

MALICIOUS

PDF

45.1 KB Created: 2020-08-05 04:26:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6d5ae700eb9d52c2a968b999ea0dc0d8 SHA-1: e143b4b6732fab9d61efec34a91ef8dc023b41f1 SHA-256: a6c842751a8135c9ceb4b8bbaa4866ed6610a9f5945dc38ee909821adeb4b157
120 Risk Score

Malware Insights

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

The PDF contains a significant number of embedded links, with one pointing to a known malicious redirector. The document body, though heavily obfuscated, contains the URL that is also present in the heuristics. This suggests the primary goal is to redirect the user to malicious infrastructure, likely for further exploitation or phishing. No scripts were extracted, limiting the analysis of direct payload execution.

Heuristics 3

  • 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.
  • 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=occupational+exposure+band+pdf
    • http://famevu.rustlingmeadows.com/uploads/1/3/1/0/131069934/mixosaw.pdf
    • http://files.designsbykimmarie.com/uploads/1/3/0/7/130739059/nizizapibejezim.pdf
    • http://dexoxajo.justcapsusa.com/uploads/1/3/2/6/132681556/kadosozuvamizenugu.pdf
    • https://cdn.shopify.com/s/files/1/0431/0335/5034/files/48171050663.pdf
    • https://cdn.shopify.com/s/files/1/0435/2425/9992/files/95961794745.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/77636621448.pdf
    • https://cdn.shopify.com/s/files/1/0435/4061/1226/files/limugivenolejetibadikidup.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/bodadajigewodozisidezufe.pdf
    • https://cdn.shopify.com/s/files/1/0429/9679/3503/files/vemibaxixuzoz.pdf
    • https://cdn.shopify.com/s/files/1/0434/3264/0664/files/jofakofox.pdf
    • https://cdn.shopify.com/s/files/1/0437/3122/2677/files/gugemava.pdf
    • https://cdn.shopify.com/s/files/1/0435/5411/1656/files/filesekilubakumexesitoti.pdf
    • https://cdn.shopify.com/s/files/1/0430/0436/2906/files/taramekusesevafiw.pdf
    • https://cdn.shopify.com/s/files/1/0428/2744/8476/files/7468672864.pdf
    • https://cdn.shopify.com/s/files/1/0433/7316/6744/files/10225754802.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_off0000723c.bin
1b9da77fd3e6e967f311ad28e60e414b4fc934d7a9f72d32b345d0c12f61380f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x723C 5384 bytes
font_01_sfnt_off00008490.bin
982fa927e3af9cfe77c3d45bc5c077dc81e1b394424ed25ce6cb9b711aeddcca		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8490 10252 bytes

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