Malicious PDF — malware analysis report

Static analysis result for SHA-256 c62a850107b9811c…

MALICIOUS

PDF

40.3 KB Created: 2020-09-08 16:41:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8a3e03ff1fc1ff09ded3099ecc2b7426 SHA-1: 482769b761d767d5544d8d37c3020d40294bbe70 SHA-256: c62a850107b9811c585a43a6063cd530300aea05c16ab41bac41bf78882bd20d
120 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, a common tactic for SEO link farms and redirectors. One critical heuristic identified a link to a known malicious redirector, ttraff.me, which is disguised as an educational worksheet. The document body, though heavily obfuscated, contains the same URL, reinforcing the malicious intent. The presence of many benign-looking links hosted on cdn.shopify.com likely serves to camouflage the malicious redirector.

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.me/wix?keyword=associative+commutative+distributive+identity+properties+worksheet
    • https://static.usrfiles.com/ugd/b8c837_74c3717893964734b545cf26028f6726.pdf
    • https://static.usrfiles.com/ugd/f5bc2a_2fb2f31a5ab2486288a87bfe873ea004.pdf
    • https://static.usrfiles.com/ugd/e3ed1f_c19cb283e4834f4ba6ed0cfda7679609.pdf
    • https://static.usrfiles.com/ugd/ea9bdf_4782c9cec5ba433299683c2483c15ca0.pdf
    • https://cdn.shopify.com/s/files/1/0447/9585/4997/files/overkill_men_at_work.pdf
    • https://cdn.shopify.com/s/files/1/0433/6327/0815/files/data_analysis_test_questions_and_answers.pdf
    • https://cdn.shopify.com/s/files/1/0437/3191/0821/files/tulegulaka.pdf
    • https://cdn.shopify.com/s/files/1/0431/4054/6714/files/25438707153.pdf
    • https://cdn.shopify.com/s/files/1/0431/1754/3588/files/rubewukemixuja.pdf
    • https://cdn.shopify.com/s/files/1/0428/8770/8825/files/23867370570.pdf
    • https://cdn.shopify.com/s/files/1/0427/5005/0460/files/70320253020.pdf
    • https://cdn.shopify.com/s/files/1/0436/0133/0339/files/46296737294.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_off00005cde.bin
a3476e70307481b6c4bf86893f2e18b879aeb39dfe3d5ccea820c50d95bfbc11		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5CDE 5728 bytes
font_01_sfnt_off0000704d.bin
f6ed612c206bd847ab13a0965ef97daa54afb70cb28ce6efdef35748a044daf2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x704D 10516 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.