Malicious PDF — malware analysis report

Static analysis result for SHA-256 bb7ddb79ebd13440…

MALICIOUS

PDF

42.5 KB Created: 2020-08-17 05:33:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6d4379c425529c2bbe0663fe835b6563 SHA-1: ccd25ae1f7bfc6fb1d189dca35d7d09daf63d8b5 SHA-256: bb7ddb79ebd13440bf73276908b6518d9903c0f80c61b8a9c7bbe7bb823d506f
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file contains a large number of embedded links, with one identified as a malicious redirector. The primary malicious URL is https://ttraff.ru/pify?keyword=various+daylife+apk, which likely serves as a gateway to further malicious content. The document body is heavily obfuscated and contains metadata indicating it was generated by wkhtmltopdf, suggesting it might be part of a link farm or SEO poisoning campaign designed to lure users to malicious sites.

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.ru/pify?keyword=various+daylife+apk
    • http://files.mesajuniors.com/uploads/1/3/0/8/130873945/ruxarizot-kafazam-kebexadi-ruwijaw.pdf
    • http://files.rootsandwingstraining.com/uploads/1/3/1/6/131606984/a7d0f1374.pdf
    • http://files.quintessence-abq.com/uploads/1/3/2/3/132303359/nujomefax.pdf
    • http://xedew.justcrafts.net/uploads/1/3/0/7/130740496/3799519.pdf
    • https://cdn.shopify.com/s/files/1/0431/7685/3664/files/14356090421.pdf
    • https://cdn.shopify.com/s/files/1/0433/0127/3768/files/barron_s_sat_math_workbook_6th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0436/7102/7865/files/tuzujuzezuzosapinefa.pdf
    • https://cdn.shopify.com/s/files/1/0439/2475/0504/files/sebupan.pdf
    • https://cdn.shopify.com/s/files/1/0451/3293/9417/files/behold_a_pale_horse_deutsch.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/zututekafufefosapebuk.pdf
    • https://cdn.shopify.com/s/files/1/0434/5656/1318/files/57658229883.pdf
    • https://cdn.shopify.com/s/files/1/0431/1869/0458/files/92082059203.pdf
    • https://cdn.shopify.com/s/files/1/0428/8095/8617/files/titexi.pdf
    • https://cdn.shopify.com/s/files/1/0430/0052/9049/files/suvinobukokezurozu.pdf
    • https://cdn.shopify.com/s/files/1/0433/6248/4383/files/26370325180.pdf
    • https://cdn.shopify.com/s/files/1/0437/3184/5271/files/language_planning_in_sociolinguistics.pdf
    • https://cdn.shopify.com/s/files/1/0429/4544/6044/files/kedikoxuguv.pdf
    • https://cdn.shopify.com/s/files/1/0427/9923/5228/files/20421848201.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_off00006800.bin
efa4ee5f4909f8d4f17f84a5e8bd76c0ff20b9e56914a0caae384f908dce168f
pdf-font-stream PDF embedded font (sfnt) at offset 0x6800 5164 bytes
font_01_sfnt_off000079b0.bin
56d119ecf9f7e5ed81d78fc5f45bb5c814b4396f877f30252b1a6200070d0c83
pdf-font-stream PDF embedded font (sfnt) at offset 0x79B0 10448 bytes