Malicious PDF — malware analysis report

Static analysis result for SHA-256 449ba3429a200773…

MALICIOUS

PDF

43.1 KB Created: 2020-08-18 21:32:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2ce2edcf1ed122fa9aba5116082df582 SHA-1: 1139b22a5e049861b46b130a5824e49d7dac5b66 SHA-256: 449ba3429a200773a00a6effbe6f9631ef12eb65179b6cf1ea907e0c946b9b1c
152 Risk Score

Malware Insights

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

The PDF contains a mass of external links, with the primary redirector URL being identified as malicious. The ML classifier also strongly indicated maliciousness. The document body, though heavily obfuscated, contains the malicious redirector URL and numerous other URLs hosted on Shopify and other domains, suggesting a link farm designed to obscure the ultimate destination. This pattern is consistent with phishing or malware distribution campaigns.

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/pify?keyword=feather+tattoo+template
    • http://files.insightmentalwellness.com/uploads/1/3/1/4/131406592/ce7967b28d58.pdf
    • http://pawozovo.brianriordanmusic.com/uploads/1/3/1/8/131856158/bca3cd9313930c1.pdf
    • http://files.graceinwellsville.com/uploads/1/3/0/9/130969917/6286939.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/65925238695.pdf
    • https://cdn.shopify.com/s/files/1/0430/0147/9321/files/41706679794.pdf
    • https://cdn.shopify.com/s/files/1/0428/7492/9319/files/kefozenulof.pdf
    • https://cdn.shopify.com/s/files/1/0437/1510/0826/files/approximation_with_solution.pdf
    • https://cdn.shopify.com/s/files/1/0436/7053/6345/files/pajis.pdf
    • https://cdn.shopify.com/s/files/1/0439/1026/7035/files/50420241324.pdf
    • https://cdn.shopify.com/s/files/1/0433/6241/8846/files/pulojuvododuwima.pdf
    • https://cdn.shopify.com/s/files/1/0429/6772/8279/files/jewokuk.pdf
    • https://cdn.shopify.com/s/files/1/0437/4292/0869/files/manual_cafeteira_tramontina_breville.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_off00006258.bin
ac3813b838969a549ae83271093a907537db6ff6f9096ca5f888c1585fcea1a6
pdf-font-stream PDF embedded font (sfnt) at offset 0x6258 4472 bytes
font_01_sfnt_off00007182.bin
39d72021a8daa5892098c7456d0a38e185aa80af3fa7605d6d11c2b06e4e4be4
pdf-font-stream PDF embedded font (sfnt) at offset 0x7182 9472 bytes
font_02_sfnt_off000091de.bin
1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361
pdf-font-stream PDF embedded font (sfnt) at offset 0x91DE 4324 bytes