Malicious PDF — malware analysis report

Static analysis result for SHA-256 b0b64f151dc1cd5f…

MALICIOUS

PDF

52.5 KB Created: 2020-08-30 04:02:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3992a91b9c7ddeaf23189627dd12e218 SHA-1: e047f90f533589b5a1b83c8dd95616da47421445 SHA-256: b0b64f151dc1cd5f4678dbece11063ad0c9788c77a241caa09f90eb6ee5fdfe5
152 Risk Score

Malware Insights

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

The PDF contains embedded links that point to a known malicious redirector (ttraff.ru). Heuristics indicate it's a malicious redirector and part of a link farm, suggesting an attempt to lure users to malicious content. The ML classifier also strongly flagged this PDF as malicious. The document body, though heavily obfuscated, contains the same redirect URL.

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.ru/wix?keyword=makalah+tentang+konsep+dan+praktik+demokrasi+serta+pendidikan+demokrasi
    • https://static.usrfiles.com/ugd/ea2f88_4b7ab7e28aaf49e8a924ae6aee264c03.pdf
    • https://static.usrfiles.com/ugd/bdeb4c_8c0602adeb754d209144e7dfa32b020a.pdf
    • https://static.usrfiles.com/ugd/b8c837_fb3f081d440445e785ead5b9b7aed636.pdf
    • https://static.usrfiles.com/ugd/9ff9b8_56fa647971b34e9e99535e6986b5b2b0.pdf
    • https://static.usrfiles.com/ugd/bfbc46_af34bba5ec004263a7bb4c532fbb8934.pdf
    • https://static.usrfiles.com/ugd/b8c837_382e334395aa4a4f8bcb044adaced5c0.pdf
    • https://static.usrfiles.com/ugd/3b47cb_a4456fea974f4921a29796ee56e92366.pdf
    • https://cdn.shopify.com/s/files/1/0437/0916/9815/files/vukafuwixegojawapuna.pdf
    • https://cdn.shopify.com/s/files/1/0428/8672/5799/files/apprendre_langue_allemande.pdf
    • https://cdn.shopify.com/s/files/1/0438/0947/2669/files/kofubiwavewara.pdf
    • https://cdn.shopify.com/s/files/1/0435/8864/9123/files/android_studio_gitignore.pdf
    • https://static.usrfiles.com/ugd/b8c837_2de0a9dc2c264526926d7851542ac9a4.pdf
    • https://static.usrfiles.com/ugd/b47706_7ac57efbcf3743498b550599d3a45f2b.pdf
    • https://static.usrfiles.com/ugd/d5415a_6738991deca04db6aeb2d599bad10cf7.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/
    • https://cdn.shopify.com/s/files/1/04

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000915a.bin
2baa6e9bcb951f9495e0970101dd5d883f97bdc8f14036a67f29173f7f3674c0
pdf-font-stream PDF embedded font (sfnt) at offset 0x915A 5444 bytes
font_01_sfnt_off0000a3af.bin
43f4a6368d69aa3e59d6159ab7bccf3ac3ac934af5332adf6a6142d2dfc1b838
pdf-font-stream PDF embedded font (sfnt) at offset 0xA3AF 9520 bytes