Malicious PDF — malware analysis report

Static analysis result for SHA-256 1a998591b0a35ea8…

MALICIOUS

PDF

50.5 KB Created: 2020-08-30 12:00:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 37d5a975e544372472cdab2f3d3b2a61 SHA-1: 59197df4fd18bead62b13cfc20b1f77087e471e6 SHA-256: 1a998591b0a35ea82bf67fdc2d6f8f1257e3d450368cff7796188f375f6b6aef
152 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to a domain identified as a malicious redirector. The primary malicious URL, https://ttraff.club/wix?keyword=panasonic+lumix+fz300+reviews, is likely used to funnel users to malicious sites. The document body, though heavily obfuscated, contains references to this URL and other PDF links, reinforcing the link farm attack pattern. 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.club/wix?keyword=panasonic+lumix+fz300+reviews
    • https://static.usrfiles.com/ugd/271e65_58c960f3d285428eb2e174da594fa8c8.pdf
    • https://static.usrfiles.com/ugd/d4da64_a08f7625484545e49f06fc61ce645e03.pdf
    • https://static.usrfiles.com/ugd/c75f60_50747e23434d4d86b85e755a249f67c4.pdf
    • https://static.usrfiles.com/ugd/b8c837_2eb17ebcb54d4dd4b98a7b1c9242065a.pdf
    • https://static.usrfiles.com/ugd/824332_dda4b839b1234513a846a46a9dfb9bfd.pdf
    • https://static.usrfiles.com/ugd/b8c837_04040f7608d74a0495fb67801fd37b0b.pdf
    • https://static.usrfiles.com/ugd/63d3ad_2721f0ae28294482bb31c5d6810529f3.pdf
    • https://static.usrfiles.com/ugd/cf14a4_5d9d0adcd80d429d96a3ae3788e99487.pdf
    • https://static.usrfiles.com/ugd/b8c837_18c195f4a4f64fd790ff49a32eeea7dc.pdf
    • https://static.usrfiles.com/ugd/07e02c_54063d55f7474139b8746820e10db969.pdf
    • https://static.usrfiles.com/ugd/b8c837_7506fef1033245dfa52584f97b659f66.pdf
    • https://static.usrfiles.com/ugd/b8c837_1cbf32c67fcd438ebdac23d0626f80df.pdf
    • https://static.usrfiles.com/ugd/934fc3_f00b7551997c49a99d7274677843ca39.pdf
    • https://cdn.shopify.com/s/files/1/0437/2607/8101/files/kekobetulerozodazife.pdf
    • https://cdn.shopify.com/s/files/1/0452/2472/2589/files/lutesax.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_off00007861.bin
5d12b2082f78f053ec97a58e179689ae5f5a6a0a1e006d75539cc25ddff10dcd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7861 5404 bytes
font_01_sfnt_off00008ab2.bin
86e9a57aed4302eba215efbd134e1e78fd7c78b0b9ce2953a6d6edbff8382051		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8AB2 10660 bytes
font_02_sfnt_off0000af26.bin
0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAF26 4324 bytes

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