Malicious PDF — malware analysis report

Static analysis result for SHA-256 f9732b04400077af…

MALICIOUS

PDF

33.9 KB Created: 2020-09-01 09:58:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6c30da11a02285a29a2d8b13bfbd0725 SHA-1: 8e817690e1f901ff8d03d492991daf304b0427d8 SHA-256: f9732b04400077afc7292f016181ee2e33cd3b1af8dff8f944462eb7d1d7000d
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to a link farm hosted on static.usrfiles.com. One of the primary links, however, directs to a known malicious redirector at ttraff.com. The document body, though heavily obfuscated, contains text related to 'alta utah weather report' and the malicious URL, suggesting a lure to disguise the malicious intent. The heuristic firings confirm the presence of a malicious redirector and a link farm.

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.com/wix?keyword=alta+utah+weather+report
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/vinufew.pdf
    • https://cdn.shopify.com/s/files/1/0429/9482/7418/files/46072550458.pdf
    • https://cdn.shopify.com/s/files/1/0436/7450/1273/files/west_ham_vs_newcastle_match_report.pdf
    • https://static.usrfiles.com/ugd/6da380_28573c05381147fb83c20bca4ff5f32f.pdf
    • https://static.usrfiles.com/ugd/b8c837_dfd14b0a20db4a07b04017a4f6d7075c.pdf
    • https://static.usrfiles.com/ugd/08fe48_4820f370b8324b0892fbbefcfccfd050.pdf
    • https://static.usrfiles.com/ugd/735424_c1154eeab64b45c29ab51864d1933a3c.pdf
    • https://static.usrfiles.com/ugd/b8c837_becb0226ab7e4071bde5f85573797eb2.pdf
    • https://static.usrfiles.com/ugd/b8c837_6e38efd6c37c41e383d1e78f3e2a72d8.pdf
    • https://static.usrfiles.com/ugd/0d2908_624ef111da534677a2aa16473f0ed8d8.pdf
    • https://static.usrfiles.com/ugd/764aaa_3295e6caa7d9465e8d9034d6a4c8daae.pdf
    • https://static.usrfiles.com/ugd/aff7ca_bc67351fdbe741759b682d90a23efaf7.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_off000049a5.bin
fb60eb93eae901ee9a4eae433ae4ec3c01db47717d6be592fa806e480441f61c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x49A5 4812 bytes
font_01_sfnt_off00005a0b.bin
488c76b576a258c7ad40141a861af4b92a444978ad30e7abf8ff2f6dec7e2b1a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5A0B 9696 bytes

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