Malicious PDF — malware analysis report

Static analysis result for SHA-256 b12340ea7eed02e6…

MALICIOUS

PDF

44.2 KB Created: 2020-08-31 09:56:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 274245aee0148be7203fbe1e64734956 SHA-1: 96ad371a110be2894ae6529948d4c2ae6b31e7c0 SHA-256: b12340ea7eed02e6142c1e93990bb1e775a19b4bb1ce96a149d85b35352c38df
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 'https://ttraff.cc/wix?keyword=nitro+pro+full'. This URL is likely used to deliver a malicious payload or redirect to a phishing site. The document also contains a large number of embedded links, many of which point to Shopify domains, suggesting a link farm or SEO poisoning tactic to increase visibility. The ML classifier strongly flagged this PDF 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.cc/wix?keyword=nitro+pro+full
    • https://cdn.shopify.com/s/files/1/0433/2853/6744/files/12241237090.pdf
    • https://cdn.shopify.com/s/files/1/0428/5349/9046/files/musuvufid.pdf
    • https://cdn.shopify.com/s/files/1/0438/6881/5528/files/table_of_contents_indesign_template.pdf
    • https://cdn.shopify.com/s/files/1/0430/5430/1338/files/remove_blank_pages_from_adobe_pro.pdf
    • https://cdn.shopify.com/s/files/1/0434/8405/3669/files/born_not_made_the_entrepreneurial_personality.pdf
    • https://static.usrfiles.com/ugd/b8c837_1419705ab4874e0bac4a3c4176785338.pdf
    • https://static.usrfiles.com/ugd/510a18_e6407d4853fb4ef991f0cea2268b90d9.pdf
    • https://static.usrfiles.com/ugd/c618e9_29d8abdc253b4d4e9459275d617a519e.pdf
    • https://cdn.shopify.com/s/files/1/0437/6975/7850/files/october_mourning.pdf
    • https://cdn.shopify.com/s/files/1/0434/0688/5020/files/php_file_upload_scripts.pdf
    • https://cdn.shopify.com/s/files/1/0433/8555/3061/files/22300183577.pdf
    • https://cdn.shopify.com/s/files/1/0434/7723/7917/files/giwomoj.pdf
    • https://cdn.shopify.com/s/files/1/0434/2313/7957/files/monosacaridos_definicion_y_ejemplos.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000637e.bin
a74af619c597dd48a80c416d1b380a4fdb662a4f334a2f18127074dfca83ab7b
pdf-font-stream PDF embedded font (sfnt) at offset 0x637E 4132 bytes
font_01_sfnt_off00007193.bin
dbe66dd9e1afe963ba959376b5f9b33ab416731dcd9c78a1c412933ccb05ac61
pdf-font-stream PDF embedded font (sfnt) at offset 0x7193 11172 bytes
font_02_sfnt_off00009657.bin
a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f
pdf-font-stream PDF embedded font (sfnt) at offset 0x9657 4324 bytes