Malicious PDF — malware analysis report

Static analysis result for SHA-256 3ced99fa100988b7…

MALICIOUS

PDF

52.8 KB Created: 2020-07-30 17:54:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 238b9514cb6c7f4fc5ac9e4a7190cfd5 SHA-1: b8b4f2cc77741d0b370e3a78b376edc4bf8abdc0 SHA-256: 3ced99fa100988b70f8950891a1fd7146602957f484ac43c416cd44cda67c2b3
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.001 Malicious Link T1059.001 PowerShell

The PDF contains a malicious redirector link that is disguised as a legitimate download. The link leads to 'ttraff.com', which is flagged as a malicious redirector. The document body text, though heavily obfuscated, appears to contain keywords related to the lure. The ML classifier strongly indicates maliciousness.

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/pify?keyword=accountant+interview+questions+and+answers+pdf+download
    • http://files.pinnaclehcbr.com/uploads/1/3/1/6/131637372/3390382.pdf
    • http://files.franksflybox.com/uploads/1/3/0/7/130739712/bodoxuragabir_wukibakuvagaw.pdf
    • http://files.jairamom.com/uploads/1/3/1/0/131070894/motonoj_tokapifobadoxid_pavebota.pdf
    • http://files.jbwintouch.com/uploads/1/3/1/4/131406749/xosono.pdf
    • http://files.flindersislandrunning.org/uploads/1/3/1/4/131437064/1729054.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/libidurekatomanazavevufi.pdf
    • https://cdn.shopify.com/s/files/1/0432/4130/8320/files/52176503991.pdf
    • https://cdn.shopify.com/s/files/1/0431/8153/9489/files/80189767712.pdf
    • https://cdn.shopify.com/s/files/1/0433/3754/7929/files/20795909720.pdf
    • https://cdn.shopify.com/s/files/1/0432/3121/5780/files/fozosubutogowazivo.pdf
    • https://cdn.shopify.com/s/files/1/0432/1673/2320/files/69096774558.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/ropuxikasafomudixaxo.pdf
    • https://cdn.shopify.com/s/files/1/0434/4774/6710/files/3728157365.pdf
    • https://cdn.shopify.com/s/files/1/0431/1724/8673/files/14962420340.pdf
    • https://cdn.shopify.com/s/files/1/0436/8374/1849/files/76047875637.pdf
    • https://cdn.shopify.com/s/files/1/0431/9110/7742/files/nenogorositomi.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/nanejixiv.pdf
    • https://cdn.shopify.com/s/files/1/0432/3606/5438/files/xovefo.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_off0000906a.bin
330e1987d51ae13f066e59304409f0942e16db902450e0410d0f684f5a5e1074
pdf-font-stream PDF embedded font (sfnt) at offset 0x906A 5300 bytes
font_01_sfnt_off0000a285.bin
7310fab3eb2dd64de5b46c9c83a28b85e108ccf8075bc5694b2435475e54a816
pdf-font-stream PDF embedded font (sfnt) at offset 0xA285 10144 bytes