Malicious PDF — malware analysis report

Static analysis result for SHA-256 709dd7ac7923de9d…

MALICIOUS

PDF

45.5 KB Created: 2020-08-02 06:42:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2a7164bad6dd7ccc8c9d4ca36603c2f4 SHA-1: f04ec220185ac9abe6fa679fc8f9152a47bdc556 SHA-256: 709dd7ac7923de9ddc4b0fcebeaa9cd6b27d61b79ecabd3dc75f9044533add3b
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of embedded links, many of which point to domains associated with link farms and redirectors. One critical heuristic identified a link to known malicious redirector infrastructure, specifically 'ttraff.cc', which is used to obscure the final destination. The document body, though heavily obfuscated, contains text related to 'Final cut pro x windows', suggesting a lure to download or access pirated software.

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.cc/pify?keyword=final+cut+pro+x+windows
    • http://files.soclumsyinheels.com/uploads/1/3/1/3/131380845/b2950.pdf
    • http://files.eliasonfoundation.org/uploads/1/3/2/6/132682585/8986841.pdf
    • http://files.tadybusiness.com/uploads/1/3/0/7/130775750/951fa536.pdf
    • http://files.directoverheaddoors.com/uploads/1/3/1/8/131856188/4dbde744636.pdf
    • http://files.southernblackhillswater.com/uploads/1/3/0/7/130738503/b493a3e9.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/mowojemabedeju.pdf
    • https://cdn.shopify.com/s/files/1/0432/6142/7867/files/55129141742.pdf
    • https://cdn.shopify.com/s/files/1/0433/1136/6309/files/60250685792.pdf
    • https://cdn.shopify.com/s/files/1/0434/3260/7894/files/21077770471.pdf
    • https://cdn.shopify.com/s/files/1/0431/8360/3873/files/4281280239.pdf
    • https://cdn.shopify.com/s/files/1/0438/1540/3677/files/togaza.pdf
    • https://cdn.shopify.com/s/files/1/0431/0482/9602/files/xapojemudimikigar.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/32852202686.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/27588499931.pdf
    • https://cdn.shopify.com/s/files/1/0431/7442/8829/files/mojumujuwiko.pdf
    • https://cdn.shopify.com/s/files/1/0432/7522/3206/files/56178496000.pdf
    • https://cdn.shopify.com/s/files/1/0435/8524/1245/files/bonabene.pdf
    • https://cdn.shopify.com/s/files/1/0441/3403/9704/files/49185949544.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000073bb.bin
37314849b00a128cdb543d99070e3b90857a2f0efc9f328f6e02733b8de1c3f7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x73BB 5180 bytes
font_01_sfnt_off0000857f.bin
ed3e11245ac1d1a3e62528fb25122cde54ebb488fe523a08881e3685d75e1b76		 pdf-font-stream PDF embedded font (sfnt) at offset 0x857F 10392 bytes

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