Malicious PDF — malware analysis report

Static analysis result for SHA-256 23411149167bad01…

MALICIOUS

PDF

41.3 KB Created: 2020-08-31 04:52:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e9b5a4cd891cb1ea6ff22424bc7e7bca SHA-1: 804bc6466d425df1b90ab9e643cdb976770fa1ea SHA-256: 23411149167bad01fbfd716c82c86ced2ad74a1d12c98d283f2825caea7d636e
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.com'. This URL is embedded within the document body, suggesting an attempt to direct the user to a malicious site. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted, and the document body content is largely unreadable binary data, but the presence of the malicious URL is sufficient evidence for the attack pattern.

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.com/wix?keyword=poeme+sur+le+mariage+victor+hugo
    • https://static.usrfiles.com/ugd/e745be_9720a1ab01a84b9fad50c7f0d97ab6c7.pdf
    • https://static.usrfiles.com/ugd/76156b_f50c0707a2074ac6bb0caaf1b2227657.pdf
    • https://static.usrfiles.com/ugd/e3ff21_99c4a2e7dc3c4036aabfd6a97a09f3e5.pdf
    • https://static.usrfiles.com/ugd/b8c837_92074b9a757c491eba549f6adecaa1e6.pdf
    • https://static.usrfiles.com/ugd/469aea_e39235b5cf764a8194422240317e67e4.pdf
    • https://cdn.shopify.com/s/files/1/0432/9390/0958/files/sogojumegefiji.pdf
    • https://cdn.shopify.com/s/files/1/0446/4531/8819/files/partnership_accounts_mcq.pdf
    • https://cdn.shopify.com/s/files/1/0437/4410/0506/files/lisogetujanogo.pdf
    • https://cdn.shopify.com/s/files/1/0437/0336/9878/files/2203430577.pdf
    • https://cdn.shopify.com/s/files/1/0446/3765/1107/files/go_math_assessment_resource_with_answers_grade_7.pdf
    • https://cdn.shopify.com/s/files/1/0438/6367/0944/files/delta_swot_analysis.pdf
    • https://cdn.shopify.com/s/files/1/0429/0124/2022/files/meroxebezedudizatesuxobaw.pdf
    • https://cdn.shopify.com/s/files/1/0429/8221/1733/files/vice_ganda_death.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/
    • https://cdn.shopify.com/s/files/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006030.bin
e2f71f2e6fc1c416f826f4b179875ccf3d9b2fdf7b9fd16c0c8fc0d7313cdf45
pdf-font-stream PDF embedded font (sfnt) at offset 0x6030 5272 bytes
font_01_sfnt_off00007202.bin
e913fb895a314f999143f25f8651292fcafdf54b89585592f08f8d5a6d275f6c
pdf-font-stream PDF embedded font (sfnt) at offset 0x7202 11724 bytes