Malicious PDF — malware analysis report

Static analysis result for SHA-256 8bf6d19a05b662d5…

MALICIOUS

PDF

58.2 KB Created: 2020-08-11 18:12:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8ac798c841bddaf84bd1ab9be4d35a0f SHA-1: 751e74c5217ab71e667ed4a0b9c87825adbb8e53 SHA-256: 8bf6d19a05b662d5f679e9727ed8197e8e19ca5b5093632cb3fd83955e636ba4
120 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, a technique often used for SEO poisoning or to redirect users to malicious sites. One critical heuristic identified a link to a known malicious redirector, 'https://ttraff.ru/pify?keyword=bsc+botany+books+pdf', which is likely intended to deliver a secondary payload or phish for credentials. The document body, though heavily obfuscated, contains the same lure text and URLs, reinforcing the social engineering aspect of this attack.

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=bsc+botany+books+pdf
    • http://files.fremontfd.com/uploads/1/3/1/4/131455475/gusixolibufikon-zidovavuwasok.pdf
    • http://files.getwirelessnz.com/uploads/1/3/0/7/130775606/zarijisonob-kovalefobopez-rolozevu.pdf
    • http://giwed.vvrengineering.com/uploads/1/3/1/4/131407227/4a3ed4132.pdf
    • http://files.theadaptedbook.com/uploads/1/3/0/9/130969699/2709380.pdf
    • https://cdn.shopify.com/s/files/1/0431/8891/2290/files/rizafubig.pdf
    • https://cdn.shopify.com/s/files/1/0431/2278/6466/files/ribisakefe.pdf
    • https://cdn.shopify.com/s/files/1/0428/3724/6118/files/23957848227.pdf
    • https://cdn.shopify.com/s/files/1/0436/8993/5002/files/lopedisisepugig.pdf
    • https://cdn.shopify.com/s/files/1/0427/6033/9623/files/8476445784.pdf
    • https://cdn.shopify.com/s/files/1/0434/2572/6625/files/98948256673.pdf
    • https://cdn.shopify.com/s/files/1/0433/2745/5400/files/goxudupupedosafaru.pdf
    • https://cdn.shopify.com/s/files/1/0430/6383/6834/files/8610870601.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/89709194360.pdf
    • https://cdn.shopify.com/s/files/1/0432/1820/6887/files/arcadia_deck_plan.pdf
    • https://cdn.shopify.com/s/files/1/0438/0744/1053/files/david_deangelo_books.pdf
    • https://cdn.shopify.com/s/files/1/0438/1809/0653/files/bovazabififap.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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007734.bin
f574c992abc08cfedffaa1d50b17aa0f9afd16c8b704fa3b66783a40dcf41e15		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7734 5376 bytes
font_01_sfnt_off0000898f.bin
35c0a746fcdf55e64f2ba55209f6a139fa5d4ea47dce36c63c78d1e6d66b29b6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x898F 3204 bytes
font_02_sfnt_off00009680.bin
7c39ce28624f4542f75b1ffc8145173145833d4531dc284b7a223e4ff974262f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9680 2576 bytes
font_03_sfnt_off0000a176.bin
8fcf441067aeeb7ffce57449b37db60c79d766bdf4e1d3d5e7bc0152be05ae13		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA176 10516 bytes
font_04_sfnt_off0000c562.bin
bcccb725c9682f8e52dc21f4dbed28cfeb791f33e6a2205b1cf2355c7010a67b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC562 16260 bytes

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