Malicious PDF — malware analysis report

Static analysis result for SHA-256 29e6d2067e3844e8…

MALICIOUS

PDF

40.3 KB Created: 2020-09-03 10:16:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 09168f847a9eec53aefe6ba5ecdbc53b SHA-1: fd22583b4281bdbbb0e7569af88be35eab27bed4 SHA-256: 29e6d2067e3844e8eabaf2c927eb53087c8988ae25668eae99d585b7d2535001
152 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by a machine learning classifier and contains numerous embedded links. One critical heuristic identified a link to a known malicious redirector infrastructure, specifically `https://ttraff.me/wix?keyword=free+blogspot+templates+for+portfolio`. Another heuristic indicated a PDF link farm, with many links pointing to `static.usrfiles.com`. The document body, though heavily obfuscated, contains text related to 'free blogspot templates' and the malicious URL, suggesting a lure to a content farm or phishing site.

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.me/wix?keyword=free+blogspot+templates+for+portfolio
    • https://static.usrfiles.com/ugd/a891c0_163c4a115d0b4421bf58b6750fdc2fa2.pdf
    • https://static.usrfiles.com/ugd/accd1f_f92da43c217e499f955f585970b6b590.pdf
    • https://static.usrfiles.com/ugd/3ceeb9_f50791bbff0946ada328a51e458d9527.pdf
    • https://static.usrfiles.com/ugd/d7d6cd_be57a95f0b4348c8a64b8ef421e4c8e8.pdf
    • https://static.usrfiles.com/ugd/dcc11b_7757154bad0643908fb877aeceaabec6.pdf
    • https://static.usrfiles.com/ugd/5af86b_a3da21a3efdb465c8dda280cdb74963f.pdf
    • https://static.usrfiles.com/ugd/b8c837_9ea159a8f45149bea093e136e8018726.pdf
    • https://static.usrfiles.com/ugd/b8c837_5d7761434a5449a08151a7cdeeb9cc05.pdf
    • https://static.usrfiles.com/ugd/717a42_4e5fb262dd4c46fe8c33113274b44e57.pdf
    • https://static.usrfiles.com/ugd/078c79_8c573d5b999948e0b809648a6b03a711.pdf
    • https://static.usrfiles.com/ugd/0dcf4b_0f541b4e29624d72895af978c1f9a4f1.pdf
    • https://static.usrfiles.com/ugd/5bb01c_806744fa24184d6ca77fbd06d0fbccda.pdf
    • https://static.usrfiles.com/ugd/c3f59f_53dfa368eaa4444b8bec1e3c957ab7f8.pdf
    • https://cdn.shopify.com/s/files/1/0447/1940/7257/files/windows_server_2008_keys.pdf
    • https://cdn.shopify.com/s/files/1/0461/9275/4839/files/xamufemoniwibod.pdf
    • https://cdn.shopify.com/s/files/1/0432/5238/3902/files/wusolevodelamemiduf.pdf
    • https://cdn.shopify.com/s/files/1/0434/3378/7542/files/old_letter_template_ks2.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_off000060f5.bin
d9f31bc86dd2272c07ccead657e45a5c2cc5e0e1b5fcc0a83bfda56789d47bbe		 pdf-font-stream PDF embedded font (sfnt) at offset 0x60F5 5316 bytes
font_01_sfnt_off000072f4.bin
276c7e964702fb0e2f598eb1aae795b4363fb7238924a6ffd573cb0f092e4f0d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x72F4 9668 bytes

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