Malicious PDF — malware analysis report

Static analysis result for SHA-256 5bfaa4e363c3e00c…

MALICIOUS

PDF

37.9 KB Created: 2020-08-29 06:49:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a4335bac8506bbfa6fcc6d6d6b75b8ea SHA-1: 4ec7a8e400f5e5bc2a094d83e49848122b40b395 SHA-256: 5bfaa4e363c3e00c6aa42585956888cf07aa7ffd4b1982ec00ac38cd74df513f
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains embedded links, one of which points to known malicious redirector infrastructure (ttraff.com). The document body, though heavily obfuscated, contains text suggesting it is a manual, likely a lure to encourage clicks. The presence of numerous external PDF links further indicates a link farm or redirection scheme.

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/wix?keyword=technics+sh+8017+manual
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/b8c837_04ba36cb25b14989b3ddd3fe3d2cb6fb.pdf
    • https://static.usrfiles.com/ugd/b8c837_1e31b88086104db29415b86c1fade428.pdf
    • https://static.usrfiles.com/ugd/b8c837_4743c9084c134d339576654058d18b0f.pdf
    • https://static.usrfiles.com/ugd/b8c837_a2ed33a746e141df92f4cf37ceee8fc8.pdf
    • https://static.usrfiles.com/ugd/b8c837_f2933df0f45a4e1c93f0ae2af8fecf26.pdf
    • https://static.usrfiles.com/ugd/b8c837_075814fc31294f309475eb99f4ffc81e.pdf
    • https://static.usrfiles.com/ugd/b8c837_abe6bba0a8304adcb885ee555a61a8ab.pdf
    • https://static.usrfiles.com/ugd/b8c837_6be614b22c3548e18788740c7ce0d049.pdf
    • https://static.usrfiles.com/ugd/b8c837_18a7b2f238d04a11a77e10866007eeee.pdf
    • https://static.usrfiles.com/ugd/b8c837_8e52b85748f1468db76280c43edec44d.pdf
    • https://cdn.shopify.com/s/files/1/0431/0191/3244/files/menalokojaxubika.pdf
    • https://cdn.shopify.com/s/files/1/0434/6737/4758/files/lewupubufiwulopotoka.pdf
    • https://cdn.shopify.com/s/files/1/0433/4718/1718/files/47050001027.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005448.bin
e6249b0aae4b469bcb31cb4ae6339dacb09a89a458841b9b84001f64a4b322bd
pdf-font-stream PDF embedded font (sfnt) at offset 0x5448 5360 bytes
font_01_sfnt_off00006660.bin
95e4c14ea5027ff6844f311e0c2088f4f6c6de0effc1bb87233b40aff15e5fdf
pdf-font-stream PDF embedded font (sfnt) at offset 0x6660 10800 bytes