Malicious PDF — malware analysis report

Static analysis result for SHA-256 79fc62f2f458f6bc…

MALICIOUS

PDF

45.3 KB Created: 2020-08-08 17:08:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 459e12ac6ff35b164c175556e61500c4 SHA-1: cba1a26a06705813c7c689acb12864737eb20e41 SHA-256: 79fc62f2f458f6bccc2b27e4a7791c81377d6f2273ab3e7893bec3e8af2d1d7b
120 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to external PDF files, suggesting a link farm for SEO manipulation. One critical heuristic identified a link to a known malicious redirector, 'ttraff.ru', which is used to obscure the final destination. The document body, though heavily obfuscated, contains the string 'Halloween word search puzzle pdf' and a URL that matches the redirector, indicating a social engineering lure. The presence of numerous benign-looking Shopify links alongside the malicious redirector suggests an attempt to blend in. No scripts were extracted from this sample.

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.ru/pify?keyword=halloween+word+search+puzzle+pdf
    • http://dijaguvul.drjamieahn.com/uploads/1/3/1/4/131406717/2b6825aaa74.pdf
    • http://files.tutleymutleytextiles.com/uploads/1/3/0/7/130739651/8950311.pdf
    • http://files.bjspoultry.com/uploads/1/3/1/4/131453253/fac9307cf11.pdf
    • https://cdn.shopify.com/s/files/1/0428/7732/1379/files/how_to_make_words_bold_in_discord.pdf
    • https://cdn.shopify.com/s/files/1/0437/2915/8295/files/81678370293.pdf
    • https://cdn.shopify.com/s/files/1/0432/4861/5579/files/naxifawidokonoxurenuvimom.pdf
    • https://cdn.shopify.com/s/files/1/0432/7689/4372/files/pugof.pdf
    • https://cdn.shopify.com/s/files/1/0438/1409/2960/files/66321891961.pdf
    • https://cdn.shopify.com/s/files/1/0434/5223/5938/files/ramuvibonerurodape.pdf
    • https://cdn.shopify.com/s/files/1/0436/2154/8194/files/13413766527.pdf
    • https://cdn.shopify.com/s/files/1/0427/7560/9510/files/famojesiluxawusaxo.pdf
    • https://cdn.shopify.com/s/files/1/0427/8131/1132/files/99234732568.pdf
    • https://cdn.shopify.com/s/files/1/0433/0048/7332/files/febaxomonenikezu.pdf
    • https://cdn.shopify.com/s/files/1/0435/8291/4723/files/bobcat_853_specifications.pdf
    • https://cdn.shopify.com/s/files/1/0436/0539/3571/files/2722453017.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/rosetotirumeza.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_off000065d9.bin
7624fc091e2fe4e64c615ca4d1c44418a109ec0f70b6c522b14e03922eb5db86
pdf-font-stream PDF embedded font (sfnt) at offset 0x65D9 5100 bytes
font_01_sfnt_off0000773b.bin
a7aaed62e76de48ebdccdd869acbb5eb55661d183a4efe231faeb2ea78dc2506
pdf-font-stream PDF embedded font (sfnt) at offset 0x773B 10120 bytes
font_02_sfnt_off000099e0.bin
1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361
pdf-font-stream PDF embedded font (sfnt) at offset 0x99E0 4324 bytes