Malicious PDF — malware analysis report

Static analysis result for SHA-256 90baa9ccf2591a58…

MALICIOUS

PDF

33.3 KB Created: 2020-08-31 01:32:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 38ee1449b8a7b47a5f02b75febf6d1b7 SHA-1: eb490b1812d4b73f878415658effde5d447717e5 SHA-256: 90baa9ccf2591a58cb93161feffd7822d713573b77fa81ccd421d4ff415ccf5b
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a heuristic firing for a malicious redirector link, specifically pointing to 'ttraff.com'. The document body, though heavily obfuscated, contains text related to 'land rover lr3 manual download' and the malicious URL, suggesting a lure to trick users into clicking the link. The PDF also contains a large number of embedded links, many pointing to shopify.com, which is flagged as a link farm. The ML classifier also strongly indicated maliciousness.

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=land+rover+lr3+manual+download
    • https://cdn.shopify.com/s/files/1/0428/9980/0217/files/gakowozadivo.pdf
    • https://cdn.shopify.com/s/files/1/0435/9897/1038/files/gexax.pdf
    • https://cdn.shopify.com/s/files/1/0433/6123/9192/files/29613650314.pdf
    • https://cdn.shopify.com/s/files/1/0464/9654/6984/files/vodujumawepenidolivewe.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/94608223162.pdf
    • https://static.usrfiles.com/ugd/6f58fb_94a9871910124cd6b0d597845b3a9a79.pdf
    • https://static.usrfiles.com/ugd/bb13a2_9b066b49126d46cf82e8d8dc607c1f62.pdf
    • https://static.usrfiles.com/ugd/b8c837_ebaa5da43e824dd68ca5ff8a5f2a29fc.pdf
    • https://static.usrfiles.com/ugd/856cea_03320adb72a842939e876ba08ef03a2f.pdf
    • https://static.usrfiles.com/ugd/e4ff69_58237a0b80274383a92f26cb6fbb0a3f.pdf
    • https://cdn.shopify.com/s/files/1/0435/3412/3160/files/21981174837.pdf
    • https://cdn.shopify.com/s/files/1/0435/3579/4327/files/82858896796.pdf
    • https://cdn.shopify.com/s/files/1/0448/4258/2176/files/bronchiolitis_rch.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_off000044f3.bin
d42398388cbe4b80cff825c51abc927228d4c99e3b25e3ee83120105ce2eec83
pdf-font-stream PDF embedded font (sfnt) at offset 0x44F3 5052 bytes
font_01_sfnt_off0000561f.bin
72953830e8ed9bc28ae8a4cd331d7e1e084d30c8863850ff7ec546072cb641d6
pdf-font-stream PDF embedded font (sfnt) at offset 0x561F 10060 bytes