Malicious PDF — malware analysis report

Static analysis result for SHA-256 d55b22c66fbce756…

MALICIOUS

PDF

43.5 KB Created: 2020-08-12 10:10:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 90ad275b6e512d5b440801e8ca3c84db SHA-1: c3adb0acaa1e0b46ed2269852d1603e5e050ee43 SHA-256: d55b22c66fbce7566c98eb8003cce1d1b2921692d777b65dd79be13ddb845412
120 Risk Score

Malware Insights

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

The PDF file exhibits characteristics of a link farm, embedding numerous external links. One critical heuristic identifies a link to known malicious redirector infrastructure at 'https://ttraff.cc/pify?keyword=audyt+it+pdf'. The document body, though heavily obfuscated, also contains this URL, suggesting it is a primary lure. The presence of many links, including those hosted on cdn.shopify.com and other domains, indicates a broad attempt to distribute malicious content.

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=audyt+it+pdf
    • http://zavugij.nutritionandhealthfiji.com/uploads/1/3/1/6/131637881/6425060.pdf
    • http://xurutufi.annheideman.com/uploads/1/3/1/4/131452883/renerewefaxaxo.pdf
    • http://files.marthaheil.org/uploads/1/3/0/7/130740596/sazorefu.pdf
    • https://cdn.shopify.com/s/files/1/0430/2651/4077/files/laliga.pdf
    • https://cdn.shopify.com/s/files/1/0432/2174/5822/files/5482956621.pdf
    • https://cdn.shopify.com/s/files/1/0431/7980/2782/files/work_permit_application_form_thailand.pdf
    • https://cdn.shopify.com/s/files/1/0435/4444/5092/files/kufon.pdf
    • https://cdn.shopify.com/s/files/1/0433/8148/9813/files/tojakege.pdf
    • https://cdn.shopify.com/s/files/1/0445/9154/6532/files/angielski_b2_ksika.pdf
    • https://cdn.shopify.com/s/files/1/0450/3034/2806/files/convert_small_to_ppt.pdf
    • https://cdn.shopify.com/s/files/1/0440/0853/8262/files/dotupaxasilurekuj.pdf
    • https://cdn.shopify.com/s/files/1/0430/8946/1402/files/25123906084.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/woburorofinuxup.pdf
    • https://cdn.shopify.com/s/files/1/0434/1297/9879/files/degakisagiliri.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_off00005fea.bin
78b3f7700af8586c3533a497804e309e712486465d8e68dd2d300e8ff3668d77		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5FEA 4160 bytes
font_01_sfnt_off00006e15.bin
0fb7cfd0c6f15bbc6437a0fbcd5edbead05825dc0fadaf100a6d4b0393b2a93a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6E15 11168 bytes
font_02_sfnt_off00009382.bin
7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9382 4324 bytes

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