Malicious PDF — malware analysis report

Static analysis result for SHA-256 583db78365eacaf0…

MALICIOUS

PDF

42.7 KB Created: 2020-09-14 07:17:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ccc5bd2641dacc5b01ebf2c0c137d083 SHA-1: 056f47baa83dc313dc1f25ff98b0e9859110dc72 SHA-256: 583db78365eacaf09274932da8c3931699e79a78c7de53d2e11f3d215dd86a9f
152 Risk Score

Malware Insights

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

The PDF contains a mass of external links, including a prominent one disguised as a 'Bose user manual' that points to a known malicious redirector. The ML classifier strongly indicated maliciousness. No scripts were extracted, but the document's structure and embedded links suggest a phishing or social engineering lure designed to redirect the user to 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.link/wix?keyword=bose+user+manual
    • https://cdn.shopify.com/s/files/1/0440/5254/5701/files/11_bio_zoology_practical.pdf
    • https://cdn.shopify.com/s/files/1/0432/4920/5405/files/d_d_adventurers_league_character_sheet_online.pdf
    • https://cdn.shopify.com/s/files/1/0463/1573/3154/files/xoxawosafisijifos.pdf
    • https://cdn.shopify.com/s/files/1/0430/8929/7568/files/94964057475.pdf
    • https://cdn.shopify.com/s/files/1/0468/0086/3381/files/42341269801.pdf
    • https://cdn.shopify.com/s/files/1/0435/5329/2440/files/seven_wonders_of_the_ancient_world_book.pdf
    • https://cdn.shopify.com/s/files/1/0432/0490/3069/files/jifagegupepipifezofukutex.pdf
    • https://cdn.shopify.com/s/files/1/0430/7976/2073/files/husqvarna_chainsaw_repairs.pdf
    • https://static.usrfiles.com/ugd/5c7528_fa8e40dba7ab48d6be12d59151235b43.pdf
    • https://static.usrfiles.com/ugd/756799_fcdd80bda5604bb08c039f3393b1a6c9.pdf
    • https://static.usrfiles.com/ugd/6c98bc_feaa6b320f0f4405b2e258bbb22a1bae.pdf
    • https://static.usrfiles.com/ugd/771ea4_387e294662b94c26828254003f99c1f7.pdf
    • https://static.usrfiles.com/ugd/764aaa_13f0857fcb2c4d1dae2dfbf781f439c3.pdf
    • https://static.usrfiles.com/ugd/b8c837_86c9a4350dd940938455b2054075c08f.pdf
    • https://static.usrfiles.com/ugd/191a6d_0fc2dd78fa0645d39b4bc39fe0986c82.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_off00006988.bin
49c1297a6826f99b803f1ddadb4f49c2004b825f3a8236a6b137114c41dd1c37
pdf-font-stream PDF embedded font (sfnt) at offset 0x6988 4880 bytes
font_01_sfnt_off00007a00.bin
af55a03a132fcf3e5b71327f96e6d313707427529489f40a50498011b63d51ad
pdf-font-stream PDF embedded font (sfnt) at offset 0x7A00 10652 bytes