Malicious PDF — malware analysis report

Static analysis result for SHA-256 35293f877cf8b446…

MALICIOUS

PDF

52.2 KB Created: 2020-08-25 12:45:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8848692a9d0fd6a89001312351706d1e SHA-1: ea8c3751a9ec2a89c01809c836d6ecfd85bd0f84 SHA-256: 35293f877cf8b4461dcd070e25b1b1d9105a6d86692e85db9652ae35dc93e10a
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded URLs, a technique often used for SEO link farming or to redirect users to malicious sites. One critical heuristic identified a link to a known malicious redirector, ttraff.cc, which is likely the primary malicious payload delivery mechanism. The document body itself is heavily obfuscated and contains a mix of text and URLs, further supporting the malicious redirection intent.

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/pify?keyword=black+background+wallpaper
    • http://files.prettycardsandmore.com/uploads/1/3/2/6/132680986/bezizuvufowukur.pdf
    • https://cdn.shopify.com/s/files/1/0434/9820/9446/files/flyer_template_ms_word.pdf
    • https://cdn.shopify.com/s/files/1/0434/6462/2246/files/32917713316.pdf
    • https://cdn.shopify.com/s/files/1/0447/6724/8535/files/cave_story_2_apk.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/64830269039.pdf
    • https://cdn.shopify.com/s/files/1/0432/5982/2244/files/vojovejowokutasevem.pdf
    • https://cdn.shopify.com/s/files/1/0435/4742/6975/files/xesixanu.pdf
    • https://cdn.shopify.com/s/files/1/0430/8277/6727/files/vakosatuzasuz.pdf
    • https://cdn.shopify.com/s/files/1/0432/5667/6510/files/pusekidapemubo.pdf
    • https://cdn.shopify.com/s/files/1/0440/0313/1542/files/solazilak.pdf
    • https://cdn.shopify.com/s/files/1/0432/7669/7760/files/punch_sound_effect_download.pdf
    • https://cdn.shopify.com/s/files/1/0434/9270/4408/files/joravefuligesabefirav.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_off0000789c.bin
62752da4f45e7bdeda50ec5652c9302f3be4e58781175a08538c63025e1dda46		 pdf-font-stream PDF embedded font (sfnt) at offset 0x789C 5160 bytes
font_01_sfnt_off00008a35.bin
21ea465ea62b359f221b42adf92ca043154c022c54f816aa0ad6ab01ed2571c2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8A35 13828 bytes
font_02_sfnt_off0000b620.bin
7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB620 4324 bytes

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