Malicious PDF — malware analysis report

Static analysis result for SHA-256 5521276bfa0b3516…

MALICIOUS

PDF

40.8 KB Created: 2020-08-06 05:27:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6ebad6fd7c30bcda9d8f12239471dae8 SHA-1: 34be63c8c2c8e14679e801e817ddfa4a0f0dc4ab SHA-256: 5521276bfa0b35167fadb2c5d5504595676b8654ef00e2f3ccccf08e4e52eea2
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 links, many of which point to Shopify domains, but one critical link directs to a known malicious redirector at ttraff.ru. The document body, though heavily obfuscated, contains the text 'Can kindle read pdf books' and the malicious URL, suggesting a lure to a phishing or malware distribution site. The presence of a malicious redirector link indicates the primary intent is to lead the user to a harmful destination.

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=can+kindle+read+pdf+books
    • http://files.aandnlawn.com/uploads/1/3/0/7/130775475/4511354.pdf
    • http://files.kardholder.com/uploads/1/3/0/7/130740142/ramubitu_ronitibija_garofawig_mowoxewoveriroj.pdf
    • http://depajir.bthomasart.com/uploads/1/3/0/8/130874493/1809f81d64.pdf
    • https://cdn.shopify.com/s/files/1/0435/2606/2239/files/21991361652.pdf
    • https://cdn.shopify.com/s/files/1/0431/9461/3924/files/78818674005.pdf
    • https://cdn.shopify.com/s/files/1/0431/4536/3610/files/51881652145.pdf
    • https://cdn.shopify.com/s/files/1/0429/1385/7692/files/55470465209.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/37237973095.pdf
    • https://cdn.shopify.com/s/files/1/0434/4433/8838/files/data_warehouse_tutorialspoint.pdf
    • https://cdn.shopify.com/s/files/1/0430/6694/9786/files/mamadekuzonexe.pdf
    • https://cdn.shopify.com/s/files/1/0428/1594/6911/files/kixowozo.pdf
    • https://cdn.shopify.com/s/files/1/0433/4741/1096/files/install_cuda_ubuntu.pdf
    • https://cdn.shopify.com/s/files/1/0433/9915/1768/files/33104339143.pdf
    • https://cdn.shopify.com/s/files/1/0428/8148/2919/files/13313718218.pdf
    • https://cdn.shopify.com/s/files/1/0429/2254/1209/files/lunirumibubenojoruzili.pdf
    • https://cdn.shopify.com/s/files/1/0436/0673/7053/files/44600263013.pdf
    • https://cdn.shopify.com/s/files/1/0429/3269/9295/files/attitude_scale_questionnaire.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_off000061f5.bin
4065663f516bbf2d0f6dee8d1bcbdd2263b170d3b7c9233dbc8edf2f62cf1e7d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x61F5 5144 bytes
font_01_sfnt_off0000737c.bin
175cfa29dbc832e6d4de7748e816e96b6d7addabfa53c0234594cac346fcc152		 pdf-font-stream PDF embedded font (sfnt) at offset 0x737C 10120 bytes

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