Malicious PDF — malware analysis report

Static analysis result for SHA-256 c87f5e23d553d497…

MALICIOUS

PDF

45.1 KB Created: 2020-08-09 10:49:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 50f0956156e5165d05e43f453d7dc826 SHA-1: 83838b3298268090469f12d4f20a94bdd0c1502f SHA-256: c87f5e23d553d49795cfae619d9ab53d971214adde24e9331110bfbf0c7ae2f6
120 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with one critical heuristic identifying a link to a known malicious redirector infrastructure. The document body, though heavily obfuscated, contains the target URL which is designed to appear as a search result for a technical book, likely to trick users into clicking. The presence of numerous other links to Shopify domains suggests a link farm or SEO poisoning tactic to increase the visibility of the malicious redirector.

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=data+structures+and+algorithms+in+c+pdf+schaum+series
    • http://gikoluxer.landinarizona.com/uploads/1/3/1/3/131381428/nogametosix_minolop_jusexe_pomapixe.pdf
    • http://files.dianalara-somatics.com/uploads/1/3/1/4/131438150/sinuboxusulogigutese.pdf
    • http://files.jamesdouglasmultimedia.com/uploads/1/3/1/3/131383483/584417a81ddf8.pdf
    • https://cdn.shopify.com/s/files/1/0431/1816/6167/files/24196448176.pdf
    • https://cdn.shopify.com/s/files/1/0431/0931/8813/files/nabudafagumidelepanogifi.pdf
    • https://cdn.shopify.com/s/files/1/0430/5115/5618/files/3821885909.pdf
    • https://cdn.shopify.com/s/files/1/0431/6993/9612/files/31932720296.pdf
    • https://cdn.shopify.com/s/files/1/0440/0742/4158/files/zijanokebetujuwunenanevas.pdf
    • https://cdn.shopify.com/s/files/1/0437/2915/8295/files/69599723474.pdf
    • https://cdn.shopify.com/s/files/1/0432/2479/3245/files/ccna_1_portugues.pdf
    • https://cdn.shopify.com/s/files/1/0432/1103/0683/files/dajajasidabajuwaxelil.pdf
    • https://cdn.shopify.com/s/files/1/0431/3251/8555/files/download_wondershareelement_full_crack.pdf
    • https://cdn.shopify.com/s/files/1/0430/3667/2162/files/92893005048.pdf
    • https://cdn.shopify.com/s/files/1/0430/9801/3845/files/embroidery_stitch.pdf
    • https://cdn.shopify.com/s/files/1/0428/3308/4575/files/vijorujafebovo.pdf
    • https://cdn.shopify.com/s/files/1/0430/0298/6659/files/biduvifevod.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_off00006184.bin
619bdf05e29d3cc6e9d5c68f37b61d90b1521092e5ce851f7171e686e8d69f9e
pdf-font-stream PDF embedded font (sfnt) at offset 0x6184 5452 bytes
font_01_sfnt_off000073e0.bin
f3e84b4e459274fe299d4a02acd3af1380c979eb3889be1f2ac2dcb71ca6874c
pdf-font-stream PDF embedded font (sfnt) at offset 0x73E0 10936 bytes
font_02_sfnt_off000098fb.bin
d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378
pdf-font-stream PDF embedded font (sfnt) at offset 0x98FB 4324 bytes