Malicious PDF — malware analysis report

Static analysis result for SHA-256 8e699d0a6bb074de…

MALICIOUS

PDF

56.4 KB Created: 2020-09-01 23:17:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c649b0eceaf8a058211989bb229ff8e4 SHA-1: d424713678fd6285503aebcd33436fa6869e2a19 SHA-256: 8e699d0a6bb074de48a21d09252d4e431c689f910414bd9c5a27f7aa098152cf
152 Risk Score

Malware Insights

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

The PDF contains a link farm with multiple embedded URLs, including a known malicious redirector at 'https://ttraff.cc/wix?keyword=manfaat+media+audio+visual+pdf'. The ML classifier also strongly indicated maliciousness. The document body is heavily obfuscated and appears to be junk data, but the presence of the redirector and link farm suggests a phishing or malware delivery attempt.

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/wix?keyword=manfaat+media+audio+visual+pdf
    • https://static.usrfiles.com/ugd/93971e_6cb61838dac3468a8677d14f8b89d6e3.pdf
    • https://static.usrfiles.com/ugd/b8c837_adbd0af643e044f780a6adb97b53f8f8.pdf
    • https://static.usrfiles.com/ugd/b8c837_0359343dc87846aa8fcf29998e796332.pdf
    • https://static.usrfiles.com/ugd/824332_5c8ad1838b6c497ebbeae9bb13939c1b.pdf
    • https://static.usrfiles.com/ugd/32777b_ae638f6aa14f4acaae194fe9763c1988.pdf
    • https://static.usrfiles.com/ugd/0df15e_681c815fcdaf4733a22cb00ec4d86dbc.pdf
    • https://static.usrfiles.com/ugd/b8c837_16d40a386dc844cdb4fc434921724c2d.pdf
    • https://static.usrfiles.com/ugd/b8c837_119944b4b5ee4258828b5250fe89c084.pdf
    • https://static.usrfiles.com/ugd/67e251_0428d01c6ea24b92b1feee247ef1f0cd.pdf
    • https://static.usrfiles.com/ugd/b8c837_11734de3b77c411581461eb84533a23e.pdf
    • https://cdn.shopify.com/s/files/1/0427/5542/4423/files/memorial_service_template_editable.pdf
    • https://cdn.shopify.com/s/files/1/0432/6146/0644/files/samsung_universal_print_drivers.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_off000092d1.bin
64798f520267aff71d4cc5fc839749d7e4d48d1f40c0d9fbffa5665e3aabec5e
pdf-font-stream PDF embedded font (sfnt) at offset 0x92D1 5036 bytes
font_01_sfnt_off0000a3e6.bin
de92e237d0499d9956c80751bbf2600f622c35e7b094f1ca2c24c6e5dee69feb
pdf-font-stream PDF embedded font (sfnt) at offset 0xA3E6 10172 bytes
font_02_sfnt_off0000c6b3.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3
pdf-font-stream PDF embedded font (sfnt) at offset 0xC6B3 4324 bytes