Malicious PDF — malware analysis report

Static analysis result for SHA-256 30fef507c3a972d7…

MALICIOUS

PDF

39.9 KB Created: 2020-08-16 11:59:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2e0ba7dcd37d6d1f1921a3d271d3cb85 SHA-1: 0bb822b82b0f81c9c7490cea8cbbdb67e0af17d1 SHA-256: 30fef507c3a972d76897f8e9a6c75e16329a74d20a000f5247b359f332135b8a
152 Risk Score

Malware Insights

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

This PDF document contains numerous embedded links, many of which point to a redirector service (ttraff.com) that is flagged as malicious. The document body, though heavily obfuscated, includes the URL for the malicious redirector, suggesting it is intended to lure users into clicking it. The presence of a large number of external links, including those hosted on cdn.shopify.com, indicates a link farm strategy, likely to improve SEO for malicious content or to obscure the true destination. 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=admin+assistant+job+description+template
    • http://jofulajo.tdgun.com/uploads/1/3/1/6/131637814/fobubudovozam.pdf
    • http://files.whrvenue.com/uploads/1/3/0/7/130739951/948558.pdf
    • https://cdn.shopify.com/s/files/1/0440/1538/6774/files/banderas_de_todos_los_paises_del_mundo.pdf
    • https://cdn.shopify.com/s/files/1/0437/6369/5770/files/tips_for_happy_life.pdf
    • https://cdn.shopify.com/s/files/1/0433/5756/9176/files/80241041527.pdf
    • https://cdn.shopify.com/s/files/1/0431/0089/7434/files/xamuzubo.pdf
    • https://cdn.shopify.com/s/files/1/0436/5520/0918/files/lalat_buah_bactrocera_dorsalis.pdf
    • https://cdn.shopify.com/s/files/1/0429/7624/7967/files/netamomeziwipi.pdf
    • https://cdn.shopify.com/s/files/1/0436/0863/7602/files/2008_ford_escape_owners_manual.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/golalebilafofuzugetuvi.pdf
    • https://cdn.shopify.com/s/files/1/0434/6642/4486/files/romuxozolupuloner.pdf
    • https://cdn.shopify.com/s/files/1/0433/6022/3397/files/waradulokave.pdf
    • https://cdn.shopify.com/s/files/1/0433/8457/0019/files/minecraft_mods_for_xbox_one.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/72518400380.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_off00005e22.bin
a5aebe718b7f53365e42498ee8cd725d38a2597a1a596e2c8e0066a153d8b90e
pdf-font-stream PDF embedded font (sfnt) at offset 0x5E22 5424 bytes
font_01_sfnt_off00007070.bin
c8267888edb4d6b2d06da87932bfe730089eca132d75221516000adb6ad019f0
pdf-font-stream PDF embedded font (sfnt) at offset 0x7070 10052 bytes