Malicious PDF — malware analysis report

Static analysis result for SHA-256 8614be03f61c48c4…

MALICIOUS

PDF

49.6 KB Created: 2020-08-31 07:02:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a649f3adf321642680d87f47722c7637 SHA-1: ee49103b633477f330c86ef6260777abc1638745 SHA-256: 8614be03f61c48c460b776841c5092f2955c1ffab2905e1173ab601bb104fbea
150 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.cc/wix?keyword=size+chart+measurements+australia'. The document body, though heavily obfuscated, also contains this URL and references to 'size chart measurements australia', suggesting a lure. The presence of a mass external PDF link farm further indicates a malicious intent to distribute content or redirect users. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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=size+chart+measurements+australia
    • https://static.usrfiles.com/ugd/b8c837_d9c380340e674d38b7994a786f2529dd.pdf
    • https://static.usrfiles.com/ugd/b7ab08_8291d357388e4b9cb4d80a060498349f.pdf
    • https://static.usrfiles.com/ugd/c3f88d_359b5dbf3394438ea464acf54d34abf6.pdf
    • https://static.usrfiles.com/ugd/b8c837_117d75b6444e4070a4938bab2526fbed.pdf
    • https://static.usrfiles.com/ugd/221f3a_ec7c4cc5fc7d478e883338d81bbc58d0.pdf
    • https://static.usrfiles.com/ugd/b8c837_97576efa759d4dea8604a39c453731cc.pdf
    • https://static.usrfiles.com/ugd/e643da_40b82a1eb86248ef843895ff38e0d34c.pdf
    • https://static.usrfiles.com/ugd/b8c837_0b16d2484e3144368e9adec6b13bec03.pdf
    • https://static.usrfiles.com/ugd/2d1648_0ea7202e4bec46c99fbe26ab3b3fa1d4.pdf
    • https://cdn.shopify.com/s/files/1/0435/7432/9507/files/19619319271.pdf
    • https://cdn.shopify.com/s/files/1/0430/6190/3517/files/juvetotafenusabag.pdf
    • https://cdn.shopify.com/s/files/1/0432/9514/6139/files/boots_sheet_face_mask_super_hyaluronic.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_off00007a30.bin
3eacbfbe4918d4f8035fc91c067be6c2d1b065a2c24aaa5ab7bd211c14db0859		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7A30 5192 bytes
font_01_sfnt_off00008bb7.bin
68cf89dda708ba3314572d13fa31eefa04dd60a2349db301758eb04f1c3c339b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8BB7 14868 bytes

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