Malicious PDF — malware analysis report

Static analysis result for SHA-256 8d64e51c520d26af…

MALICIOUS

PDF

53.8 KB Created: 2020-08-04 03:04:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 797559bf370d78c411f729d2bdcb811c SHA-1: 80818511be56368f5e6a2a379e3f90a0a5a300d8 SHA-256: 8d64e51c520d26affa2d77688d82e4573182001759215a2597fbab0f0796e3f4
120 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many pointing to Shopify domains, but one critical link redirects to a known malicious infrastructure at ttraff.ru. The document body, though heavily obfuscated, contains text suggesting it is an 'Amharic afaan oromo dictionary pdf', likely a lure to disguise the malicious intent. The primary attack pattern involves redirecting the user to malicious content via a link farm.

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=amharic+afaan+oromo+dictionary+pdf
    • http://files.mealboxreview.com/uploads/1/3/0/8/130814874/7532222.pdf
    • http://files.lvapparel.net/uploads/1/3/1/4/131453706/4e3f2e0f21e5df.pdf
    • http://files.riddlemusicstudio.com/uploads/1/3/1/4/131453902/894216.pdf
    • https://cdn.shopify.com/s/files/1/0432/3049/4878/files/pigumikevuterarozokop.pdf
    • https://cdn.shopify.com/s/files/1/0440/3465/4358/files/cabling_network.pdf
    • https://cdn.shopify.com/s/files/1/0432/9937/3214/files/mapiva.pdf
    • https://cdn.shopify.com/s/files/1/0431/7318/3645/files/64924759743.pdf
    • https://cdn.shopify.com/s/files/1/0430/4479/8613/files/4536167767.pdf
    • https://cdn.shopify.com/s/files/1/0437/0661/3912/files/33870965906.pdf
    • https://cdn.shopify.com/s/files/1/0433/4741/1096/files/sizonibujezatoziwewav.pdf
    • https://cdn.shopify.com/s/files/1/0447/2451/9066/files/class_12_sociology_book.pdf
    • https://cdn.shopify.com/s/files/1/0433/3531/9711/files/67844839228.pdf
    • https://cdn.shopify.com/s/files/1/0434/8110/4541/files/lapalozufiki.pdf
    • https://cdn.shopify.com/s/files/1/0432/4953/3088/files/fujikexe.pdf
    • https://cdn.shopify.com/s/files/1/0450/9194/6661/files/mordhau_player_count.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004faa.bin
3b8af3920c1494445b21804978b0820b724b83a8f965f8b038980d3883a9d801		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4FAA 21612 bytes
font_01_sfnt_off000089c3.bin
89b8aa801e3566711e45b63da3132dd4a7077a382367c25d665a4c144b9164e8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x89C3 4948 bytes
font_02_sfnt_off00009a63.bin
0bb064ec690649d5188841e3b216620257374a8fdb3b8e1c34c26e00798f78f6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9A63 9692 bytes
font_03_sfnt_off0000bb9c.bin
1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBB9C 4324 bytes

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