Malicious PDF — malware analysis report

Static analysis result for SHA-256 99541042118f5324…

MALICIOUS

PDF

41.7 KB Created: 2020-08-07 18:42:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6da742df82e1399f67d9262848c971e8 SHA-1: 680b6e4fe4748fb159bde56c4c883b70f7a7b9cf SHA-256: 99541042118f532427856e30848112610a16628c94fa90762dc9f03981d6df07
120 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, pointing to 'ttraff.com'. The document body, though heavily obfuscated, contains text related to PDF size reduction and includes the malicious URL. The presence of numerous external PDF links, many hosted on Shopify, suggests a link farm designed to attract search engine traffic, with the primary malicious link acting as a gateway to further malicious content.

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.com/pify?keyword=adobe+illustrator+reduce+pdf+file+size
    • http://rapused.hannamonsterly.com/uploads/1/3/1/0/131071164/vuduvexeka-baxorixuvef-givakisazugaxe.pdf
    • http://dimuk.lisamusicstudio.com/uploads/1/3/1/0/131069934/1754877.pdf
    • http://files.auburnveteransparade.org/uploads/1/3/0/7/130739856/848cd66eed65c.pdf
    • http://files.codieeashwrites.com/uploads/1/3/1/6/131607810/gefil_mazukezipomox_mamitezetom.pdf
    • http://files.communitymanagers.net/uploads/1/3/0/7/130775528/6181916.pdf
    • https://cdn.shopify.com/s/files/1/0428/0687/0183/files/74283711339.pdf
    • https://cdn.shopify.com/s/files/1/0431/2973/3282/files/46860847590.pdf
    • https://cdn.shopify.com/s/files/1/0434/4253/6604/files/33871023818.pdf
    • https://cdn.shopify.com/s/files/1/0428/9318/1095/files/category_theory_textbook.pdf
    • https://cdn.shopify.com/s/files/1/0431/5453/8656/files/witcher_3_friendly_hud.pdf
    • https://cdn.shopify.com/s/files/1/0432/2246/6720/files/banazitezemuboniwapa.pdf
    • https://cdn.shopify.com/s/files/1/0434/2074/5893/files/wuduwaf.pdf
    • https://cdn.shopify.com/s/files/1/0437/5907/5477/files/acrolein_test.pdf
    • https://cdn.shopify.com/s/files/1/0435/5253/8773/files/hamilton_beach_steamer_manual.pdf
    • https://cdn.shopify.com/s/files/1/0447/7802/9213/files/afr_2020.pdf
    • https://cdn.shopify.com/s/files/1/0431/1692/0996/files/mekokujuvuz.pdf
    • https://cdn.shopify.com/s/files/1/0438/8922/9979/files/wirimipesutorolubakovek.pdf
    • https://cdn.shopify.com/s/files/1/0432/8305/4757/files/87046608077.pdf
    • https://cdn.shopify.com/s/files/1/0431/2036/1629/files/rogue_swashbuckler_5e.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_off0000657b.bin
1105e446db76cb41ea0da677fb490aa5b252c836771b87dbebf7e45ee8cb9785
pdf-font-stream PDF embedded font (sfnt) at offset 0x657B 5328 bytes
font_01_sfnt_off000077ab.bin
ef636968c2ded3c85dd61e3e144ec62bc1b5a2dcee315b6214bd335732a9bed8
pdf-font-stream PDF embedded font (sfnt) at offset 0x77AB 9800 bytes