Malicious PDF — malware analysis report

Static analysis result for SHA-256 0af69d915598c9bb…

MALICIOUS

PDF

45.6 KB Created: 2020-08-31 03:23:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 18b9c2e981ce6dafd5e94cf194d67c79 SHA-1: 33b676d94267266f11759c61d0efc8e73cfda764 SHA-256: 0af69d915598c9bbea94be6910cbc5688fcf1e54560d023d6dd8e8a4d557fd40
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains embedded links that point to a known malicious redirector infrastructure, specifically 'ttraff.ru'. The document body, though heavily obfuscated, contains the same URL, suggesting an attempt to trick users into clicking it. The presence of numerous external PDF links, many hosted on Shopify, indicates a potential link farm or SEO manipulation tactic to distribute 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=sistema+decimal+de+dewey+ejemplos
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0438/1406/0189/files/lefufadu.pdf
    • https://cdn.shopify.com/s/files/1/0433/0681/1560/files/biserial_correlation.pdf
    • https://cdn.shopify.com/s/files/1/0429/3728/6812/files/jurizodivuwexusiwekumuk.pdf
    • https://cdn.shopify.com/s/files/1/0428/1873/2191/files/maguloroduvoruv.pdf
    • https://cdn.shopify.com/s/files/1/0435/1908/2655/files/aberdare_park_primary_uniform.pdf
    • https://cdn.shopify.com/s/files/1/0435/3071/5295/files/real_football_game_mod_apk.pdf
    • https://cdn.shopify.com/s/files/1/0429/3541/9039/files/72601690529.pdf
    • https://cdn.shopify.com/s/files/1/0434/9699/7030/files/genesis_coupe_exhaust_manifold.pdf
    • https://cdn.shopify.com/s/files/1/0428/9075/6259/files/zekulezuwutilubijim.pdf
    • https://static.usrfiles.com/ugd/ea2f88_0650249cc2db4834aaf1329f1d2fe8b5.pdf
    • https://static.usrfiles.com/ugd/ea9bdf_cbea90bb11ad4d2896b01408edb825d9.pdf
    • https://static.usrfiles.com/ugd/b8c837_2fb875fa3d1c47099af43c8358cca095.pdf
    • https://static.usrfiles.com/ugd/7c3584_e2f3d40ff55b4fb49ae140cd322510c5.pdf
    • https://static.usrfiles.com/ugd/a838c0_fc6d6dc9ebbd4c1ba0000e02e466179c.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_off00007001.bin
1c9b20b482a2529c8a9774d8267c67f4e22c2cbd8e4a08f294d8ea99a2932cb0
pdf-font-stream PDF embedded font (sfnt) at offset 0x7001 5496 bytes
font_01_sfnt_off000082b2.bin
f4ae0c31056b0eb80ffc10f6343a2f8f1f528e13441fba08a48fa4facd86e68e
pdf-font-stream PDF embedded font (sfnt) at offset 0x82B2 11348 bytes