Malicious PDF — malware analysis report

Static analysis result for SHA-256 2a4f49a6b4e996ee…

MALICIOUS

PDF

52.7 KB Created: 2020-09-04 15:30:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ec3572b0a00b8553b7b225d02134c32b SHA-1: 25bd8ac1935d7fe53ef5311a429988e3b721fa11 SHA-256: 2a4f49a6b4e996ee58f510d78c5e7da5de94f376254a12018fa20aba552bf92d
154 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing indicating it links to known malicious redirector infrastructure. The embedded URL `https://ttraff.com/wix?keyword=mhw+gunlance+guide+2019` is likely the initial lure. The ML classifier also strongly flagged this PDF as malicious. While no scripts were extracted, the presence of a malicious redirector suggests a phishing or malware distribution 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.com/wix?keyword=mhw+gunlance+guide+2019
    • https://static.usrfiles.com/ugd/3d7af5_386fa888838c41e3afb2a6f61f8b642d.pdf
    • https://static.usrfiles.com/ugd/2b98a3_905afca7a3da4314a8c3de109c2fee07.pdf
    • https://static.usrfiles.com/ugd/90c678_dffe3dbb85a946daa4e2a34d3b337268.pdf
    • https://static.usrfiles.com/ugd/37428b_485d2bf682b5493bb032d2864db7e4cb.pdf
    • https://static.usrfiles.com/ugd/c6ac46_b45d9c7720a542b0acc807634ca77567.pdf
    • https://cdn.shopify.com/s/files/1/0435/9307/2808/files/xatufa.pdf
    • https://cdn.shopify.com/s/files/1/0428/5097/5910/files/75697899575.pdf
    • https://static.usrfiles.com/ugd/9904c2_175aba0d618e4b64bfce39ed49a8f628.pdf
    • https://static.usrfiles.com/ugd/b8c837_b01b54efad984754a2f8fd1c8321ce2c.pdf
    • https://static.usrfiles.com/ugd/ee6770_ebfd1c28b00140639e933dc89d0e1d78.pdf
    • https://static.usrfiles.com/ugd/e948c1_df3adbbd13c44ddabf0b2aabab881f2e.pdf
    • https://static.usrfiles.com/ugd/cf79db_a0650ac2d2b54baa884db0048003e9fc.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_off00008696.bin
e4a195192e9871dd2c603964b2611ff3cb64c0c720d906805544ee07deeb8f6b
pdf-font-stream PDF embedded font (sfnt) at offset 0x8696 5504 bytes
font_01_sfnt_off0000996c.bin
51ebeec29509b87aa858d500e37ac8853184703d07d1f913ce36d8e1dc7764c0
pdf-font-stream PDF embedded font (sfnt) at offset 0x996C 1800 bytes
font_02_sfnt_off0000a1fa.bin
5d3c1ff89815f3ec3f35fd3b1804f73e92f7965d086d23fe5d51da5852e76500
pdf-font-stream PDF embedded font (sfnt) at offset 0xA1FA 10360 bytes