Malicious PDF — malware analysis report

Static analysis result for SHA-256 855775fbaab6a0fb…

MALICIOUS

PDF

47.9 KB Created: 2020-09-07 12:13:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 42bb277e537fa185bc6346fde51559cf SHA-1: fcdcd6a793001eacf7f31835b3e1d2229a4ca3d2 SHA-256: 855775fbaab6a0fb94c46bee3361729501b38ed4d1ed285ec419181c7468178b
120 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded links, identified as a PDF link farm. One of these links, 'https://ttraff.me/wix?keyword=simple+window+grill+design+catalogue', points to known malicious redirector infrastructure. The document body, though heavily obfuscated, appears to be a catalogue, suggesting a lure to entice users to click the malicious links.

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=simple+window+grill+design+catalogue
    • https://static.usrfiles.com/ugd/974a4e_ec87358e01a04249a4e30349b3f96e24.pdf
    • https://static.usrfiles.com/ugd/dc8a8e_20cfc85a7846478b95089ac391b6885a.pdf
    • https://static.usrfiles.com/ugd/144d27_b9b67becb63c44cd8c6f24242aed5380.pdf
    • https://static.usrfiles.com/ugd/120f26_6bb57491ff5340288ac3ebf359f5d0c8.pdf
    • https://static.usrfiles.com/ugd/a4d998_28cfeccd803344b6a3f306f4b5c29ebb.pdf
    • https://static.usrfiles.com/ugd/3f80ec_51a4eb5acb244fc78b17a7ad90f9cd11.pdf
    • https://static.usrfiles.com/ugd/c068f8_e8d27c7d95d949deaa7cadf47095654c.pdf
    • https://static.usrfiles.com/ugd/e481ce_5697ebf64306426685ebf5d98e8a00b3.pdf
    • https://static.usrfiles.com/ugd/89064d_a560a660a0cf4193a2da7e2255536245.pdf
    • https://static.usrfiles.com/ugd/804ff6_2da39ed132a5480a96f5d4e317533e45.pdf
    • https://static.usrfiles.com/ugd/2d797c_db960cdf03234594bb589323a07cd62d.pdf
    • https://cdn.shopify.com/s/files/1/0434/3388/5863/files/sotaposutulofumolivi.pdf
    • https://cdn.shopify.com/s/files/1/0430/6026/5117/files/easy_guitar_arpeggios.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/46552055365.pdf
    • https://cdn.shopify.com/s/files/1/0437/5301/3409/files/70325259541.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006fbf.bin
5b53d7996ab086fcb63ddb8ac2bf4f5b83a14d1242d95e875d0f41ad10e5f124		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6FBF 5468 bytes
font_01_sfnt_off00008249.bin
aa0c7d1688e53018cf24305d4f485db5a944ccda4455825fb39179822d1efa65		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8249 10064 bytes
font_02_sfnt_off0000a499.bin
a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA499 4324 bytes

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