Malicious PDF — malware analysis report

Static analysis result for SHA-256 a1bdbd5225876d5b…

MALICIOUS

PDF

133.9 KB Created: 2020-09-03 02:39:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e2c6abc317aa71703cf90384b0b40fc3 SHA-1: 1d29bc8c758ace04897b428274bc15f913cc1a58 SHA-256: a1bdbd5225876d5b571728614e2925ac00b27b1db9f30396e064734fe1a53956
142 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.ru, which is disguised with a game-related keyword. Additionally, the PDF hosts a large number of external links, suggesting a link farm or SEO poisoning tactic. The presence of a callback lure heuristic indicates a potential social engineering attempt to solicit a phone call, likely related to a scam.

Heuristics 4

  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns
  • 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.ru/wix?keyword=metro+exodus++size
    • https://static.usrfiles.com/ugd/409ca8_de708bb7f294461188d9f315aba21e61.pdf
    • https://static.usrfiles.com/ugd/a7074a_d7f4470bb2db4eaf94a530513f519d06.pdf
    • https://static.usrfiles.com/ugd/3aee12_f38dfde3e55b48d8b2cf4961428725c9.pdf
    • https://static.usrfiles.com/ugd/96564c_40a4a90809ff4e7abc49e5bfaae18fab.pdf
    • https://static.usrfiles.com/ugd/b8c837_ff8c30257aba4219b1308f45bf70bb05.pdf
    • https://static.usrfiles.com/ugd/cac9e4_77654f80ef7c41c59785024f60c3c3ee.pdf
    • https://static.usrfiles.com/ugd/b8c837_62efa845e940446e88105a7eda97732d.pdf
    • https://static.usrfiles.com/ugd/067ecb_f7408040f04f41b7934712abcdd374e8.pdf
    • https://static.usrfiles.com/ugd/a1fb72_8a1ea8f0b3ee4df289f3aadb3f122a3e.pdf
    • https://cdn.shopify.com/s/files/1/0435/8845/2515/files/xakoresezonusononowe.pdf
    • https://cdn.shopify.com/s/files/1/0435/9448/1823/files/pakonejub.pdf
    • https://cdn.shopify.com/s/files/1/0432/5857/7046/files/ray_optics_for_iit_jee.pdf
    • https://cdn.shopify.com/s/files/1/0437/6687/4269/files/15126950724.pdf
    • https://cdn.shopify.com/s/files/1/0432/5815/1072/files/super_shredded_8_vs_shortcut_to_shred.pdf
    • https://cdn.shopify.com/s/files/1/0429/9515/5105/files/spreadsheet_compare_crashes.pdf
    • https://cdn.shopify.com/s/files/1/0439/2442/2811/files/there_once_was_a_girl_from_nantucket.pdf
    • https://cdn.shopify.com/s/files/1/0436/8223/4521/files/lich_king_hearthstone_guide_witchwood.pdf
    • https://cdn.shopify.com/s/files/1/0460/8701/2516/files/spellsword_build_skyrim.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_off0001c887.bin
3585cc8a45ccae0b174241a1d0d85567874ef2c643a4ee42b31bc539458f5fac
pdf-font-stream PDF embedded font (sfnt) at offset 0x1C887 3436 bytes
font_01_sfnt_off0001d4d4.bin
fb0a5eb0cad010c178bc92a21526e50fdc8b53cbbb8463b4c9314f358f00b799
pdf-font-stream PDF embedded font (sfnt) at offset 0x1D4D4 4700 bytes
font_02_sfnt_off0001e4f4.bin
3229177eb4f92342905be5374acab77f5b9f38affc8ca10343cf23ee97e8c1cb
pdf-font-stream PDF embedded font (sfnt) at offset 0x1E4F4 11068 bytes