Malicious PDF — malware analysis report

Static analysis result for SHA-256 59b1a3407b783453…

MALICIOUS

PDF

67.4 KB Created: 2020-08-22 15:42:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f8e9b958fc8d1c669d1ca44a0f4f88eb SHA-1: 4333a5778bccb02d636ccde6b02faa2b280e6367 SHA-256: 59b1a3407b7834539044add08ef8060847cbd12c0e506b5058ed91a7d744464b
152 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded external links, with many pointing to a redirector service (ttraff.cc). This suggests a link farm or redirection attack designed to obscure the ultimate malicious destination. The ML classifier also strongly indicated maliciousness. While no scripts were extracted, the heuristic firings and URL analysis point to a phishing or redirection-based attack.

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=plane+structure+pdf
    • http://joziw.imadsz.org/uploads/1/3/2/7/132710621/f766b4e432218.pdf
    • http://files.darkrisingseries.com/uploads/1/3/1/6/131606631/d961fcc5d959d.pdf
    • http://wafenufir.rkwestcoaching.com/uploads/1/3/1/4/131437092/6e44191237.pdf
    • http://files.erinboake.com/uploads/1/3/0/7/130776718/maxul_zefanenumu_ruxuxotevar_jazomagudigem.pdf
    • http://files.greensplendorlandscaping.com/uploads/1/3/0/7/130775384/710916.pdf
    • https://cdn.shopify.com/s/files/1/0432/8616/7702/files/xufalibiseso.pdf
    • https://cdn.shopify.com/s/files/1/0432/1778/0896/files/likojobisufuledudixax.pdf
    • https://cdn.shopify.com/s/files/1/0435/4385/5258/files/75809017104.pdf
    • https://cdn.shopify.com/s/files/1/0434/1828/8284/files/zufelajimodukef.pdf
    • https://cdn.shopify.com/s/files/1/0434/6766/9654/files/53626424096.pdf
    • https://cdn.shopify.com/s/files/1/0438/2231/7725/files/kopow.pdf
    • https://cdn.shopify.com/s/files/1/0433/5117/9416/files/54533591831.pdf
    • https://cdn.shopify.com/s/files/1/0433/7975/3109/files/16770888358.pdf
    • https://cdn.shopify.com/s/files/1/0428/9105/1161/files/jamezob.pdf
    • https://cdn.shopify.com/s/files/1/0430/6213/2897/files/32701045056.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_off0000cd2a.bin
a4e19f0e8d309874084dbacd80ae25a52beb97761f0f4541ec4e1dfc928a09bc
pdf-font-stream PDF embedded font (sfnt) at offset 0xCD2A 5152 bytes
font_01_sfnt_off0000deb8.bin
e7d740ef2b63592af615a9ac1034d4896446770bc4efc2e1e558bf85ebd5eec2
pdf-font-stream PDF embedded font (sfnt) at offset 0xDEB8 9948 bytes