Malicious PDF — malware analysis report

Static analysis result for SHA-256 9b9fcb40b9d923d3…

MALICIOUS

PDF

61.6 KB Created: 2020-08-30 00:42:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ad3f666a9a463efcf1534fae3c0030d6 SHA-1: 89010770de70980606af6892c98e5c018cc0ee8a SHA-256: 9b9fcb40b9d923d3b8fa46b4824cac92dce0c28023099700f4b3b66b8c678069
128 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF file contains a critical heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.ru/wix?keyword=suspicious+partner+songs'. Additionally, it exhibits a PDF link farm behavior, with numerous links pointing to benign Shopify domains, likely for SEO manipulation. The document body, though heavily obfuscated, contains the malicious URL, suggesting a lure to a malicious site. No scripts were extracted, and the document body's content is largely unreadable, but the presence of the malicious redirector is a strong indicator of malicious intent.

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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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.ru/wix?keyword=suspicious+partner+songs
    • https://cdn.shopify.com/s/files/1/0431/0102/8503/files/muduzimegomo.pdf
    • https://cdn.shopify.com/s/files/1/0437/1139/8039/files/the_gold_bug_edgar_allan_poe_read_online.pdf
    • https://cdn.shopify.com/s/files/1/0430/5797/1362/files/tupixinovaruxofosofatexuv.pdf
    • https://cdn.shopify.com/s/files/1/0433/8168/6437/files/zeketisumuwafifudipati.pdf
    • https://static.usrfiles.com/ugd/38bf1f_dbfa1c2b69924079b209989d7feacddf.pdf
    • https://static.usrfiles.com/ugd/ca32a8_810a75e9846e4ed48f02fe8b2ef69f9f.pdf
    • https://static.usrfiles.com/ugd/7ff653_c6efdecb38304df3afe62867cf66f718.pdf
    • https://static.usrfiles.com/ugd/b7082a_7e11e7ba3b504570b897622132ac152c.pdf
    • https://static.usrfiles.com/ugd/5d2cf3_bf12d822a9a24a038cf082ccc0fe5a95.pdf
    • https://cdn.shopify.com/s/files/1/0431/8907/6117/files/tenejokosulajabo.pdf
    • https://cdn.shopify.com/s/files/1/0431/7092/2655/files/81534620158.pdf
    • https://cdn.shopify.com/s/files/1/0429/1202/2691/files/adobe_writer_for_mac.pdf
    • https://cdn.shopify.com/s/files/1/0432/6300/0734/files/rizinufube.pdf
    • https://cdn.shopify.com/s/files/1/0427/7954/1671/files/taxofevovobuxerekadasup.pdf
    • https://cdn.shopify.com/s/files/1/0430/9162/4097/files/95278947461.pdf
    • https://cdn.shopify.com/s/files/1/0428/5952/8355/files/76661456745.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_off00007f0a.bin
48c62fc9da10c8da624ec5b6f7b862a6dfa4b9a9a8681002b597c3d5e21ddf9f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7F0A 9368 bytes
font_01_sfnt_off00009d51.bin
ede79d3833d373fe39a6357bca331336134fa04df243df80d119b179383beaf7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9D51 5052 bytes
font_02_sfnt_off0000ae82.bin
b97bfd0a840e9d2df93d814872173df9453d790e03ec9dae3a8f1d985514b4d4		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAE82 14120 bytes
font_03_sfnt_off0000dae6.bin
cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDAE6 4324 bytes

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