Malicious PDF — malware analysis report

Static analysis result for SHA-256 081e2f79eb02f5ca…

MALICIOUS

PDF

46.4 KB Created: 2020-09-16 16:58:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 030ff9027bfdd06f1f1ea9bb1264832c SHA-1: 2e0b6830cb619f9ac252c72d1f66c2c275b37c92 SHA-256: 081e2f79eb02f5ca06173bf8d75d0f41a1c6aff2c353b945b9afa4654cf8aac6
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, many of which point to Shopify-hosted PDFs, likely intended to appear legitimate. One prominent link directs to a known malicious redirector at 'ttraff.ru'. This suggests a tactic to drive traffic to malicious infrastructure, potentially for further exploitation or phishing. No scripts were extracted, and the document body is heavily obfuscated.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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/wix?keyword=fast+track+rules+india
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/6766/9654/files/tojobobixigiruj.pdf
    • https://cdn.shopify.com/s/files/1/0434/5203/9324/files/posid.pdf
    • https://cdn.shopify.com/s/files/1/0431/5666/8573/files/44597162799.pdf
    • https://cdn.shopify.com/s/files/1/0458/6579/5737/files/koi_to_uso_wiki.pdf
    • https://cdn.shopify.com/s/files/1/0433/6094/4296/files/how_to_convert_int_to_string_c.pdf
    • https://cdn.shopify.com/s/files/1/0432/4130/8319/files/16173702058.pdf
    • https://cdn.shopify.com/s/files/1/0435/1311/8872/files/climax_portable_machine_tools.pdf
    • https://cdn.shopify.com/s/files/1/0436/3635/9326/files/zurezaluwuxeferivowip.pdf
    • https://cdn.shopify.com/s/files/1/0433/8355/4202/files/berlitz_english_level_10.pdf
    • https://cdn.shopify.com/s/files/1/0432/0234/7171/files/81635598412.pdf
    • https://cdn.shopify.com/s/files/1/0436/2525/0974/files/sulobobar.pdf
    • https://7a682457-fdb0-4706-bbd3-61ced659d25b.filesusr.com/ugd/277b62_4426910e79744512a165fdc75b01a232.pdf?index=true
    • https://4a442b5b-f36d-4d5b-9340-1fc6dee87db7.filesusr.com/ugd/a4ea6c_813d9a63b4b341c28d1c3129949a498e.pdf?index=true
    • 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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000076c3.bin
05492112e48d9c42d8d67a7447ea31e90ae9fc08474ecc1322159423427ec76d
pdf-font-stream PDF embedded font (sfnt) at offset 0x76C3 4952 bytes
font_01_sfnt_off000087aa.bin
4a7287ce10bf10805bdfe6fefac654603aae38e71f9e1ca97de34b1c61e0b9e7
pdf-font-stream PDF embedded font (sfnt) at offset 0x87AA 11008 bytes