Malicious PDF — malware analysis report

Static analysis result for SHA-256 c64410244f6b3e32…

MALICIOUS

PDF

36.8 KB Created: 2020-08-18 13:05:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 23253d0dd4be22264f467a0e1c66e23b SHA-1: 4880fc39fef9453088a5e6a4269ec2e610cc0475 SHA-256: c64410244f6b3e32ee87f62192a5e6c63689e7b34c2fd29bcb4c17eacb91163d
154 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link pointing to 'ttraff.com'. The document body also contains this URL, disguised as a template download. The presence of numerous external links, many hosted on Shopify, suggests a link farm or SEO poisoning tactic to distribute malicious content. The ML classifier also strongly indicated 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=printable+for+sale+sign+car+template
    • http://vodof.teamlinkutahbjj.com/uploads/1/3/2/8/132814942/2537147.pdf
    • https://cdn.shopify.com/s/files/1/0440/6345/7432/files/dawuxegugoxoverutewubivix.pdf
    • https://cdn.shopify.com/s/files/1/0429/9830/0823/files/bellinzona_map.pdf
    • https://cdn.shopify.com/s/files/1/0436/2646/3385/files/jivekezowomexunuvi.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/78214852322.pdf
    • https://cdn.shopify.com/s/files/1/0433/0582/8520/files/govukareborosogik.pdf
    • https://cdn.shopify.com/s/files/1/0428/8679/1334/files/kidz_bop_call_me_maybe.pdf
    • https://cdn.shopify.com/s/files/1/0433/7713/1683/files/capital_and_revenue_expenditure.pdf
    • https://cdn.shopify.com/s/files/1/0434/5243/2537/files/performance_management_system_in_hrm.pdf
    • https://cdn.shopify.com/s/files/1/0434/8667/5109/files/lonely_planet_georgia_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0429/7211/9193/files/nobina.pdf
    • https://cdn.shopify.com/s/files/1/0428/6775/3116/files/29618003629.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_off0000473a.bin
f16226877ca106bff36214bf71c0a878c33c679e25eae916ab235271e707432c
pdf-font-stream PDF embedded font (sfnt) at offset 0x473A 5264 bytes
font_01_sfnt_off000058f7.bin
53f4caf003da8fad0abdc92e9f00e978889d32ed0858bf267556c2433227da6d
pdf-font-stream PDF embedded font (sfnt) at offset 0x58F7 9240 bytes
font_02_sfnt_off0000788b.bin
ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230
pdf-font-stream PDF embedded font (sfnt) at offset 0x788B 4324 bytes