Malicious PDF — malware analysis report

Static analysis result for SHA-256 dd6c073d4e248148…

MALICIOUS

PDF

43.5 KB Created: 2020-08-14 18:03:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8316bbb10bbb8adf2b856bd7fe3f5ffe SHA-1: 07851296e0b5de0cf790db63d99d526b2cf9867d SHA-256: dd6c073d4e2481481e019279ce77ee5c502bba07292844b837919b42d2722ac6
120 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, forming a link farm. One of these links, 'https://ttraff.com/pify?keyword=vivaldi+storm+sheet+music+piano', is known to point to malicious redirector infrastructure. The document body is heavily obfuscated and appears to be mostly garbage data, but the presence of the malicious redirector URL is a strong indicator of malicious intent, likely to lead the user to a phishing or malware download site.

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=vivaldi+storm+sheet+music+piano
    • http://files.centralscotlandhorsetrials.com/uploads/1/3/1/4/131407357/9072794.pdf
    • http://files.worcesterrefugees.org/uploads/1/3/1/3/131381910/bofafabu.pdf
    • https://cdn.shopify.com/s/files/1/0440/4396/0485/files/33270834017.pdf
    • https://cdn.shopify.com/s/files/1/0432/7515/7670/files/novezevopinutud.pdf
    • https://cdn.shopify.com/s/files/1/0431/4929/5776/files/30_day_ab_and_squat_challenge.pdf
    • https://cdn.shopify.com/s/files/1/0432/8144/9126/files/88196060100.pdf
    • https://cdn.shopify.com/s/files/1/0432/9639/1323/files/71419068336.pdf
    • https://cdn.shopify.com/s/files/1/0435/2134/3647/files/55201255302.pdf
    • https://cdn.shopify.com/s/files/1/0429/8535/7463/files/12257767828.pdf
    • https://cdn.shopify.com/s/files/1/0431/3317/3927/files/hormonios_vegetais_auxinas.pdf
    • https://cdn.shopify.com/s/files/1/0435/1682/1672/files/lorijopokus.pdf
    • https://cdn.shopify.com/s/files/1/0428/7276/6631/files/ps3_game_manuals.pdf
    • https://cdn.shopify.com/s/files/1/0440/0313/1542/files/kugetapemami.pdf
    • https://cdn.shopify.com/s/files/1/0431/0233/9232/files/wafebemumojodoxagavukovob.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_off00005c80.bin
27dae9dce5a899077b43e256685f5cf88730b4b36d1f4f73754f183ad7774ccf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5C80 5340 bytes
font_01_sfnt_off00006e84.bin
3292e9912a730d07ee438d7d991bbdaf730e793d178c1b5d21d77ac523dec43d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6E84 15760 bytes

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