Malicious PDF — malware analysis report

Static analysis result for SHA-256 85b802356a9722d4…

MALICIOUS

PDF

44.0 KB Created: 2020-08-24 09:32:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 52d439755039e45acecf554f6e153ff9 SHA-1: 1c345793b566ad6880533df3f5edee92393bb30d SHA-256: 85b802356a9722d43a83a72a0d57fb323fb2ef5083e50df0e526ed05db7f7c9e
120 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for a malicious redirector link, which points to 'https://ttraff.cc/pify?keyword=inhaled+corticosteroid+doses+for+nice+asthma+guideline'. Additionally, it exhibits characteristics of a PDF link farm, embedding numerous external links, many of which are hosted on cdn.shopify.com. The document body, though heavily obfuscated, contains the same malicious redirector URL and several benign-looking PDF links, suggesting a lure to a malicious site under the guise of providing medical information.

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=inhaled+corticosteroid+doses+for+nice+asthma+guideline
    • http://gepofin.lavidawithwings.com/uploads/1/3/2/6/132681946/paneded.pdf
    • http://files.delilahfayeart.com/uploads/1/3/1/6/131607522/rakamobexavan-bepofabadexe.pdf
    • https://cdn.shopify.com/s/files/1/0431/5811/0363/files/6993290568.pdf
    • https://cdn.shopify.com/s/files/1/0433/2496/5019/files/mcquarrie_statistical_mechanics_solutions_manual.pdf
    • https://cdn.shopify.com/s/files/1/0436/6853/7497/files/tijanamaba.pdf
    • https://cdn.shopify.com/s/files/1/0432/3196/9438/files/52496347387.pdf
    • https://cdn.shopify.com/s/files/1/0433/5665/1669/files/limezoxuravevudepejav.pdf
    • https://cdn.shopify.com/s/files/1/0429/5753/7439/files/nomenclature_of_tricyclic_compounds.pdf
    • https://cdn.shopify.com/s/files/1/0431/3173/2122/files/bunipiwaniselisizenuvo.pdf
    • https://cdn.shopify.com/s/files/1/0437/6500/6494/files/dekoduve.pdf
    • https://cdn.shopify.com/s/files/1/0428/4098/1660/files/zuvupodaz.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_off0000609a.bin
51b83b5021f7ca1a5065d5ee42973baff636ebfeea85b01486910153f0acea40		 pdf-font-stream PDF embedded font (sfnt) at offset 0x609A 5252 bytes
font_01_sfnt_off00007232.bin
afba56fb800b4cd04099a9d947c402596e705fc5351ed1d1c64026d0770f1782		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7232 10212 bytes
font_02_sfnt_off00009522.bin
4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9522 4324 bytes

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