Malicious PDF — malware analysis report

Static analysis result for SHA-256 82efab44f655e3d5…

MALICIOUS

PDF

40.7 KB Created: 2020-08-09 11:01:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b61596c9ca04f9096a977cdd48f937c0 SHA-1: cc39e43e2b30888aa5fef92f2bdbc55982cfd82c SHA-256: 82efab44f655e3d5e2b9a65d9ccb3a47fdc43fffcbcc4187c70b7de41e39dde1
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a critical heuristic firing for a malicious redirector link, specifically pointing to 'ttraff.ru'. The document body, though heavily obfuscated, also contains this URL, suggesting it is the primary lure. The PDF also contains a large number of external links, many hosted on Shopify, which is flagged as a link farm. The primary malicious URL is used to redirect the user to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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=sons+and+lovers+autobiographical+novel+pdf
    • http://files.j9wise.net/uploads/1/3/0/9/130968947/pedajilona_midapulufep_timibav.pdf
    • http://files.myotsdelivery.com/uploads/1/3/1/4/131437595/jenoburedom.pdf
    • http://laxupi.washingtonsfinesttea.com/uploads/1/3/1/6/131606289/pupasuda.pdf
    • http://zuzisu.northwestfineartstudio.com/uploads/1/3/2/7/132712207/7121628.pdf
    • https://cdn.shopify.com/s/files/1/0434/0695/0557/files/datasheet_lm35.pdf
    • https://cdn.shopify.com/s/files/1/0434/7238/8246/files/nawovako.pdf
    • https://cdn.shopify.com/s/files/1/0429/9502/4023/files/kumolebevufivog.pdf
    • https://cdn.shopify.com/s/files/1/0431/1737/9745/files/90502547338.pdf
    • https://cdn.shopify.com/s/files/1/0435/6122/2307/files/switzerland_road_map.pdf
    • https://cdn.shopify.com/s/files/1/0432/1027/7025/files/wiravubijuwupiwos.pdf
    • https://cdn.shopify.com/s/files/1/0430/6265/7177/files/bibijomiziledaziditawofu.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/fejekav.pdf
    • https://cdn.shopify.com/s/files/1/0428/8312/1319/files/kosiwozuduluko.pdf
    • https://cdn.shopify.com/s/files/1/0429/8607/8369/files/xatipavexebulusekaberepuv.pdf
    • https://cdn.shopify.com/s/files/1/0428/2312/3100/files/lowajiweziko.pdf
    • https://cdn.shopify.com/s/files/1/0438/2552/8989/files/lopaze.pdf
    • https://cdn.shopify.com/s/files/1/0430/6694/9799/files/75839383469.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_off0000616f.bin
0fa40567bb31cea73a95369d5d01f4d5c5419f2ec217fd022946edc39cefcc26		 pdf-font-stream PDF embedded font (sfnt) at offset 0x616F 5720 bytes
font_01_sfnt_off000074e6.bin
000157e3cf7fd0db0f89c7ad5eeb7651e6bba6abd0e40dd8b2b4ac8478d82f8a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x74E6 9620 bytes

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