Malicious PDF — malware analysis report

Static analysis result for SHA-256 bdee44b2da49e9b6…

MALICIOUS

PDF

39.3 KB Created: 2020-08-29 03:21:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 60748c4794fcb134ad609ea1cf10f1c7 SHA-1: 8bb0b26f719cd46e0421ffff43ffa9194698fe86 SHA-256: bdee44b2da49e9b6a675126aa17e729ae52763f80ad0c4d22fc7ac034311a9f9
120 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=benim+konu%25C5%259Fan+tom+apk+indir+cepde'. This URL is embedded within the document body, disguised as a search result for an APK download. The document also contains a large number of external PDF links, suggesting a link farm for SEO poisoning or traffic redirection. The primary malicious IOC is the redirector URL, which is likely used to lead the user to a malicious site.

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=benim+konu%25C5%259Fan+tom+apk+indir+cepde
    • https://cdn.shopify.com/s/files/1/0434/2494/0184/files/sample_project_closeout_report_construction.pdf
    • https://cdn.shopify.com/s/files/1/0438/6629/2389/files/vexiwubakuzagam.pdf
    • https://cdn.shopify.com/s/files/1/0454/2513/1676/files/lafunupikupasepi.pdf
    • https://cdn.shopify.com/s/files/1/0460/2075/5615/files/nosuzixotelo.pdf
    • https://static.usrfiles.com/ugd/b8c837_910ca1f853d14bbd9914e32619b9fbc3.pdf
    • https://static.usrfiles.com/ugd/b8c837_5f8021d585d54564b8246edea1919694.pdf
    • https://static.usrfiles.com/ugd/b8c837_cfdc32b0b66e476689a6d2f217995cc9.pdf
    • https://static.usrfiles.com/ugd/b8c837_d43c93516a0849f0b9d79c0f08777172.pdf
    • https://static.usrfiles.com/ugd/b8c837_b4b2e687be3540d99d19a2a5fd6e3dc3.pdf
    • https://static.usrfiles.com/ugd/b8c837_70871d3d0f7e48c7a2680046aef1b088.pdf
    • https://static.usrfiles.com/ugd/b8c837_33ed2aa250824ee2b529c83309b153c1.pdf
    • https://static.usrfiles.com/ugd/b8c837_dadd785551d54c5bbdd663f2063914f0.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_off00005948.bin
adbd882d4fd2d81203194acc0c69137c836b81f63996a0e8243b537ac32f7f71		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5948 5372 bytes
font_01_sfnt_off00006b6c.bin
cfc9501df3bc54ed905c1d3b2be3247efc3d757421b976d506547eb3514f44d1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6B6C 11240 bytes

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