Malicious PDF — malware analysis report

Static analysis result for SHA-256 41abe8587840c600…

MALICIOUS

PDF

41.3 KB Created: 2020-08-10 12:19:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6d1bc0be8a3270ec53f50ff37ca0029e SHA-1: 4b4a1e28a20d221e79f37b4366a70caf9e5860ad SHA-256: 41abe8587840c600cdc090f823b6acf5c3b52fb04917e3094c5d08a47ae54120
120 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded links, with the primary URL pointing to a known malicious redirector. The document body, though heavily obfuscated, contains a URL that matches the redirector. The heuristic firings indicate that the PDF is designed as a link farm, likely to distribute malicious content or facilitate phishing attacks. No scripts were extracted, limiting the analysis of direct execution capabilities.

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=neoplasia+endocrina+multiple+tipo+2a+pdf
    • http://xakov.enviscid.com/uploads/1/3/1/3/131398091/gurekiviwivi-tojogerarib-puwelomo.pdf
    • http://files.ahheidinger.com/uploads/1/3/0/8/130874676/babatib-xuxumebozejil.pdf
    • http://penimo.innerpiece.nl/uploads/1/3/1/4/131437615/38ec2f90.pdf
    • http://files.szechiuleung.com/uploads/1/3/0/9/130969545/vejopomukidaz_tunedekaj_juwamidisejivo_pevetu.pdf
    • https://cdn.shopify.com/s/files/1/0433/3748/2405/files/35064256532.pdf
    • https://cdn.shopify.com/s/files/1/0434/9391/6837/files/55496412453.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/12410546401.pdf
    • https://cdn.shopify.com/s/files/1/0430/7936/8858/files/68464616136.pdf
    • https://cdn.shopify.com/s/files/1/0430/9506/4730/files/31158817754.pdf
    • https://cdn.shopify.com/s/files/1/0433/3905/5258/files/brave_new_world_chapter_7.pdf
    • https://cdn.shopify.com/s/files/1/0440/8590/3525/files/51843047885.pdf
    • https://cdn.shopify.com/s/files/1/0430/8077/7882/files/silevadereba.pdf
    • https://cdn.shopify.com/s/files/1/0434/7992/4902/files/tudovizejut.pdf
    • https://cdn.shopify.com/s/files/1/0433/4790/2629/files/28997873670.pdf
    • https://cdn.shopify.com/s/files/1/0435/7314/9859/files/lusutifatodogalelepuvede.pdf
    • https://cdn.shopify.com/s/files/1/0438/6550/5952/files/handbook_of_arbuscular_mycorrhizal_fungi.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_off000062be.bin
511e9e7e14a879de994c35760ae26c1daec11d5a6a267bd525367a7790d6d559		 pdf-font-stream PDF embedded font (sfnt) at offset 0x62BE 5404 bytes
font_01_sfnt_off0000750d.bin
242bc85fa1b61d100c563d9cb48c12a9640a05fd363d275c00b37348fbf6be7a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x750D 10304 bytes

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