Malicious PDF — malware analysis report

Static analysis result for SHA-256 fff51b7ff8a27470…

MALICIOUS

PDF

46.7 KB Created: 2020-09-11 12:52:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0379b1036169fdabae43cc5d56b359fe SHA-1: 8e4422c96c162518124d9282157e0b34e65f9148 SHA-256: fff51b7ff8a27470d85e25664449a08c038bba60108191be1ceea5877ba82f67
150 Risk Score

Malware Insights

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

The PDF was flagged by multiple critical heuristics for containing malicious redirector links and a large external link farm. The primary malicious URL identified is https://ttraff.cc/wix?keyword=cinema+4d+character+modeling+tutorial+pdf. The document body, though heavily obfuscated, also contains this URL, suggesting it is the intended lure. The presence of numerous links to external PDFs, many hosted on seemingly benign platforms like Shopify, indicates a sophisticated SEO poisoning or link farm strategy to distribute the malicious payload.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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=cinema+4d+character+modeling+tutorial+pdf
    • http://niworotil.kitchentowncurbside.com/uploads/1/3/1/4/131437069/883051.pdf
    • http://files.nikospsaltopoulos.com/uploads/1/3/1/4/131408970/tawemisiderukida.pdf
    • http://wafenufir.rkwestcoaching.com/uploads/1/3/1/4/131437092/6e44191237.pdf
    • http://files.ukcamperhire.uk/uploads/1/3/2/6/132682303/4929cfc58f8.pdf
    • https://cdn.shopify.com/s/files/1/0436/5893/6473/files/inverse_modulo_calculator.pdf
    • https://cdn.shopify.com/s/files/1/0428/3318/2886/files/15531078582.pdf
    • https://cdn.shopify.com/s/files/1/0435/3998/8648/files/wapaneweta.pdf
    • https://cdn.shopify.com/s/files/1/0432/2879/0946/files/cf_auto_root_full_apk.pdf
    • https://static.usrfiles.com/ugd/c8a981_f08ab341de074b419379c03653f4f2fc.pdf
    • https://static.usrfiles.com/ugd/9f6a24_e623f5e2e5254676902ee3d660ec824a.pdf
    • https://static.usrfiles.com/ugd/2f3ac6_c5c8242e40454c7f82ea8cb5f28c8174.pdf
    • https://static.usrfiles.com/ugd/b8c837_9c45bc9d1bf74eeaaa4d98877f68e436.pdf
    • https://static.usrfiles.com/ugd/607883_7808a0a482e8439881964ad951e8d0dd.pdf
    • https://static.usrfiles.com/ugd/87fdc7_a776f3f8cece4e42a03a1221e39c4e60.pdf
    • https://static.usrfiles.com/ugd/b52961_b37cdd88d60b4be292b765fd7697efcf.pdf
    • https://static.usrfiles.com/ugd/837d34_fd9a871366514a1ea57739b2b9fa58af.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_off00006b5b.bin
2dc50d01642ed32a4d1d13c09f5d6f255e636cc46a94c8aa94557b093e80d654
pdf-font-stream PDF embedded font (sfnt) at offset 0x6B5B 5384 bytes
font_01_sfnt_off00007d81.bin
c5f1a05d5c0ac1c68ff138dec6790c4c79ce44bf7e85fc836eb1ff458c46c697
pdf-font-stream PDF embedded font (sfnt) at offset 0x7D81 9972 bytes
font_02_sfnt_off00009fa3.bin
1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e
pdf-font-stream PDF embedded font (sfnt) at offset 0x9FA3 4324 bytes