Malicious PDF — malware analysis report

Static analysis result for SHA-256 fcd0084c86886649…

MALICIOUS

PDF

48.1 KB Created: 2020-08-31 12:41:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e3d710872a033a23976416655bec0061 SHA-1: a2b2af8977917c9ecd6a9f5ad2bac91d1033b27b SHA-256: fcd0084c868866492c9963bad43bfdf430cc54eb0ef61a6c815b04f3c5ae280d
154 Risk Score

Malware Insights

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

The PDF contains a prominent link to `https://ttraff.cc/wix?keyword=haynes+chinese+scooter+manual+pdf`, disguised as a manual. This URL is flagged as a malicious redirector. The PDF also contains a large number of external links, many pointing to `static.usrfiles.com`, which is identified as a link farm. The ML classifier strongly indicates 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.cc/wix?keyword=haynes+chinese+scooter+manual+pdf
    • https://static.usrfiles.com/ugd/1849a1_61c52e97d9744cca92301de5a3a9dd06.pdf
    • https://static.usrfiles.com/ugd/4bb894_14a858c1cae449b2a9377685ca65f37d.pdf
    • https://static.usrfiles.com/ugd/3aca14_1182a93de98f4c799078c4054d3ee4cc.pdf
    • https://cdn.shopify.com/s/files/1/0447/5686/1077/files/kunajusowebopefuwixev.pdf
    • https://cdn.shopify.com/s/files/1/0440/7446/7478/files/94426227923.pdf
    • https://cdn.shopify.com/s/files/1/0437/8217/6920/files/vokuxarejuzewuge.pdf
    • https://static.usrfiles.com/ugd/01bc73_80c7446f682042a085fe8a1470bd80c2.pdf
    • https://static.usrfiles.com/ugd/4826f5_ca1fb9d8a75b4533a2bdefc0145574e5.pdf
    • https://static.usrfiles.com/ugd/e78b77_af569c253b504f28927659e591c443c5.pdf
    • https://static.usrfiles.com/ugd/b8c837_b2bd620b25e74164a6621d2a5f1631e8.pdf
    • https://static.usrfiles.com/ugd/6240f8_9c4250cc84874fc680ca1652851db377.pdf
    • https://static.usrfiles.com/ugd/b8c837_36d85b39c41c49b784ad540c406963a4.pdf
    • https://static.usrfiles.com/ugd/ace02d_96f35c80705f42bbbd958676f0ed3edc.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005413.bin
b8fbdc1c23090ccd5e0fa89b2ac19c4e5176d70e7167389b32a31c87ff9acc4d
pdf-font-stream PDF embedded font (sfnt) at offset 0x5413 3760 bytes
font_01_sfnt_off00006180.bin
b9bbbf42fd11d9c47e7082148c2f6285651d1c617cd6e1a3ab8e7e8a4b329af7
pdf-font-stream PDF embedded font (sfnt) at offset 0x6180 5456 bytes
font_02_sfnt_off000073ea.bin
aa02f788bf60e899e187dcf4aedd5b888bd2e1110f56add251de8ff6294b1bde
pdf-font-stream PDF embedded font (sfnt) at offset 0x73EA 10900 bytes
font_03_sfnt_off0000993d.bin
0b925baa96f2c2502ecf350427c6c6bd9df62f3fbf443f6491b154dc1d337102
pdf-font-stream PDF embedded font (sfnt) at offset 0x993D 16984 bytes