Malicious PDF — malware analysis report

Static analysis result for SHA-256 ad1ee87b912f67e1…

MALICIOUS

PDF

56.5 KB Created: 2020-07-29 20:48:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8fdb4cb30900749a28928babb4249167 SHA-1: f4224b8e3408b85434a2d1c02df5311a17420099 SHA-256: ad1ee87b912f67e11fb965cd340afef9c3f24f42dbd10d5eb61f8a0a058c372c
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, with a critical heuristic firing indicating a 'PDF_SEO_LINK_FARM'. One of these links, 'https://ttraff.cc/pify?keyword=detail+inspiration+pdf', is flagged as a malicious redirector. The document body is heavily obfuscated, but the presence of numerous external links strongly suggests an attempt to lure users to malicious sites. The authoring application 'wkhtmltopdf' is noted, but does not directly indicate a specific malware family.

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.cc/pify?keyword=detail+inspiration+pdf
    • http://files.manpatools.com/uploads/1/3/1/4/131406659/tiwexusomeri.pdf
    • http://files.lockdowndoorshades.com/uploads/1/3/1/4/131437832/gewuzemuxup_fajokexog_duwoj_wovuxuxixilejon.pdf
    • http://files.ifixcny.com/uploads/1/3/1/3/131381109/2492376.pdf
    • https://cdn.shopify.com/s/files/1/0428/5438/3782/files/fowax.pdf
    • https://cdn.shopify.com/s/files/1/0434/1868/1496/files/borobukojalodunaguxu.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/41732402988.pdf
    • https://cdn.shopify.com/s/files/1/0437/2021/2645/files/33970533059.pdf
    • https://cdn.shopify.com/s/files/1/0428/5975/7734/files/40469295576.pdf
    • https://cdn.shopify.com/s/files/1/0429/7264/3491/files/wedawamalaparofurimilom.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/57917948996.pdf
    • https://cdn.shopify.com/s/files/1/0431/8219/4847/files/98690019654.pdf
    • https://cdn.shopify.com/s/files/1/0437/7287/0807/files/72473224371.pdf
    • https://cdn.shopify.com/s/files/1/0428/9026/4742/files/suzoxurazewodule.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_off00009ffb.bin
d5f6e1fd9cca4c8f600e44bb2789ba0bd0cf5cbf1f4161476b7e9a1f896d2bad		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9FFB 4820 bytes
font_01_sfnt_off0000b066.bin
2416f88ee7f325561fc0dc8697a6880613335f2a73a29fb8b72fc5233649c07f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB066 10684 bytes

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