Malicious PDF — malware analysis report

Static analysis result for SHA-256 03aa893d191ca9ef…

MALICIOUS

PDF

55.4 KB Created: 2020-08-29 19:20:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2d146f43349fed87e975526213c4aba9 SHA-1: 63c4b1bd24185f181e44a434a11850cb4d8aa401 SHA-256: 03aa893d191ca9efbd1213a342e1278a6656f3eb1161db7dba1e53cdf95cc752
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, including one pointing to a known malicious redirector at 'https://ttraff.ru/wix?keyword=dnd+5e+shaman'. This suggests an attempt to direct users to malicious infrastructure, likely for further exploitation or phishing. The presence of a large number of external PDF links also indicates a link farm, a common tactic for SEO manipulation or distributing malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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=dnd+5e+shaman
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/6557/3537/files/water_pollution_problems_and_solutions.pdf
    • https://cdn.shopify.com/s/files/1/0437/8689/5512/files/americanah_novel.pdf
    • https://cdn.shopify.com/s/files/1/0431/6836/6746/files/lewis_structures_and_vsepr_practice_worksheet.pdf
    • https://cdn.shopify.com/s/files/1/0435/6322/1155/files/antagonista_farmacologico.pdf
    • https://static.usrfiles.com/ugd/b444d4_c2ffa2be80d243eba979807f84d97483.pdf
    • https://static.usrfiles.com/ugd/b8c837_f7d06ffd7ee54146a207f73ea5f90603.pdf
    • https://static.usrfiles.com/ugd/902d29_0fb1ea4ce69d4cdb8c0debca67707dee.pdf
    • https://static.usrfiles.com/ugd/b8c837_1398ee65aaa34f92b29ee2abb46b524d.pdf
    • https://static.usrfiles.com/ugd/b8c837_5f40be5bc94947249c1abfbd6357f31e.pdf
    • https://static.usrfiles.com/ugd/b8c837_2ffab781c4bc4666adb663c2f77c9830.pdf
    • https://static.usrfiles.com/ugd/18f527_e454e92f630549569f1300ad52eeb1f6.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000094f4.bin
53275ddc965bd9da2390eca519bbf76b06810ade705e99513f9ad7d8709efde9
pdf-font-stream PDF embedded font (sfnt) at offset 0x94F4 5060 bytes
font_01_sfnt_off0000a608.bin
0cc573a3499fbdbe883ac80bb2298335ed490661b666782045bb0324c2b62f24
pdf-font-stream PDF embedded font (sfnt) at offset 0xA608 13752 bytes