Malicious PDF — malware analysis report

Static analysis result for SHA-256 9150daac2cc84826…

MALICIOUS

PDF

43.2 KB Created: 2020-09-07 15:07:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: edc5e0ba8be4fbbb0e6224f094e758f0 SHA-1: 2c6b55c0b488537603a82c731d15d5d3d05f2f75 SHA-256: 9150daac2cc84826e0d16d32c2ab4750d351832a5ba63227f730d0b597879684
152 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded links, with heuristics indicating a link farm and a malicious redirector. The primary malicious URL identified is 'https://ttraff.club/pify?keyword=manual+brain+gym', which is likely used to obscure the final destination of the attack. The document body itself is heavily obfuscated and contains numerous URLs, many pointing to Shopify, but one specific redirector URL is flagged as malicious.

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.club/pify?keyword=manual+brain+gym
    • https://cdn.shopify.com/s/files/1/0429/5327/7589/files/best_free_shooting_games_for_android.pdf
    • https://cdn.shopify.com/s/files/1/0430/7035/7661/files/you_can_t_hurt_me.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/ximulomonarosaw.pdf
    • https://cdn.shopify.com/s/files/1/0436/5346/4214/files/93809591875.pdf
    • https://cdn.shopify.com/s/files/1/0436/0473/8206/files/87176920230.pdf
    • https://static.usrfiles.com/ugd/5f226e_e066da21d82f49b5a96b16c4f1528689.pdf
    • https://static.usrfiles.com/ugd/f7fbc8_c384432e58a34711afc822d933b0724d.pdf
    • https://static.usrfiles.com/ugd/4fea5c_ce19c42995cd4b73ba8fbf1206e0399b.pdf
    • https://static.usrfiles.com/ugd/37428b_bb398ea59da04cba8ea7adbe64f5d8cf.pdf
    • https://static.usrfiles.com/ugd/a298ce_42822056a6a847c8b53425d49f592705.pdf
    • https://cdn.shopify.com/s/files/1/0437/0949/7496/files/1782169103.pdf
    • https://cdn.shopify.com/s/files/1/0438/1917/2002/files/kumifafutoserapanamaz.pdf
    • https://cdn.shopify.com/s/files/1/0439/8232/3870/files/present_past_and_past_participle.pdf
    • https://cdn.shopify.com/s/files/1/0431/6535/2093/files/5280607651.pdf
    • https://cdn.shopify.com/s/files/1/0429/3161/7945/files/kundalini_tantra_reiki.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_off0000682a.bin
75d7f7b505329d6aa1f5b3b435a3313e96d11bb90104a3ef7c17d655378990e9
pdf-font-stream PDF embedded font (sfnt) at offset 0x682A 5072 bytes
font_01_sfnt_off0000796e.bin
24093367602feecdfd3040f0941afe37b59b686ca5b64c73669c189a21186aac
pdf-font-stream PDF embedded font (sfnt) at offset 0x796E 11064 bytes