Malicious PDF — malware analysis report

Static analysis result for SHA-256 cf6a63391883b364…

MALICIOUS

PDF

42.9 KB Created: 2020-08-08 03:21:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3cdfa7a8afeaae394a4bafda16508088 SHA-1: 5ac2acfa30b6e7037c5930098e8e84d0fb31b644 SHA-256: cf6a63391883b364dd9552a2c5808de9b52b513a56870dc1f66e770166901e42
120 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.ru/pify?keyword=abdomen+anatomy+mnemonics+pdf'. This URL is embedded within the document body, suggesting an attempt to redirect the user to malicious infrastructure under the guise of providing study material. The PDF also exhibits characteristics of a link farm, with numerous external links, further supporting the malicious 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.ru/pify?keyword=abdomen+anatomy+mnemonics+pdf
    • http://files.standardkink.com/uploads/1/3/1/8/131871467/1202448.pdf
    • http://files.patrickmcculley.com/uploads/1/3/1/3/131398573/a831397dc.pdf
    • http://files.lynnmiriamceramics.com/uploads/1/3/0/8/130813988/3330.pdf
    • https://cdn.shopify.com/s/files/1/0446/6756/8291/files/nicomachean_ethics_free.pdf
    • https://cdn.shopify.com/s/files/1/0433/7614/8638/files/songs_of_a_dead_dreamer_and_grimscribe.pdf
    • https://cdn.shopify.com/s/files/1/0428/1945/3095/files/the_weeknd_kiss_land_download.pdf
    • https://cdn.shopify.com/s/files/1/0433/4518/2888/files/getowabu.pdf
    • https://cdn.shopify.com/s/files/1/0434/5721/6678/files/13143652902.pdf
    • https://cdn.shopify.com/s/files/1/0428/8233/4883/files/84004870009.pdf
    • https://cdn.shopify.com/s/files/1/0427/9359/9132/files/80164913337.pdf
    • https://cdn.shopify.com/s/files/1/0432/3170/7294/files/kuta_software_infinite_algebra_1.pdf
    • https://cdn.shopify.com/s/files/1/0434/3565/5335/files/yoga_for_weight_loss.pdf
    • https://cdn.shopify.com/s/files/1/0432/2764/4072/files/valivufovusilesox.pdf
    • https://cdn.shopify.com/s/files/1/0433/7342/8888/files/puwifidadawekij.pdf
    • https://cdn.shopify.com/s/files/1/0433/4996/6998/files/nedaferemujasenatasoti.pdf
    • https://cdn.shopify.com/s/files/1/0431/5060/6496/files/magic_chef_2._1_portable_washer_manual.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_off00005d0d.bin
244cccda0ba09b64ebbf244ac60abdd7caa57992397b0c62cd3db6d29be535a1
pdf-font-stream PDF embedded font (sfnt) at offset 0x5D0D 5192 bytes
font_01_sfnt_off00006ea3.bin
7db3984daac20b1727e410704bae4cd6a80d835f4e665d7ba6b1a9ed3ca93daa
pdf-font-stream PDF embedded font (sfnt) at offset 0x6EA3 9852 bytes
font_02_sfnt_off0000907a.bin
1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e
pdf-font-stream PDF embedded font (sfnt) at offset 0x907A 4324 bytes