Malicious PDF — malware analysis report

Static analysis result for SHA-256 62ed1b46d51b25d9…

MALICIOUS

PDF

52.2 KB Created: 2020-07-28 13:02:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a73baeab750c529821de062233d2b1da SHA-1: 863e17cbcebf87727f8121fd3b7fa3989caf23b1 SHA-256: 62ed1b46d51b25d9104c07481d1cadd26784ecc91c862281f291606d58b997ab
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 pointing to what appears to be a link farm designed to distribute traffic. One critical heuristic indicates that a link points to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains keywords related to music and software, likely serving as a lure. No scripts were extracted, but the presence of numerous links suggests an attempt to redirect users to malicious sites.

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.com/pify?keyword=coldplay+buena+vista+social+club+clocks
    • http://files.margarethensel.com/uploads/1/3/0/8/130814715/gibosivaz_wusuwifurago_sarixodesufa.pdf
    • http://files.seashells-nursery.org/uploads/1/3/0/7/130739238/9933c619.pdf
    • http://files.sciartcenter.org/uploads/1/3/2/6/132695248/mafesix.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/danedogorolulefumatexa.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/pejodogidevetakuranuwa.pdf
    • https://cdn.shopify.com/s/files/1/0431/7492/0347/files/vemegovorunanimumezodi.pdf
    • https://cdn.shopify.com/s/files/1/0437/0422/1849/files/37413584677.pdf
    • https://cdn.shopify.com/s/files/1/0429/9200/9365/files/gomovuwarejanexodezetuxur.pdf
    • https://cdn.shopify.com/s/files/1/0432/2240/1185/files/womepetoseletuw.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/40133843423.pdf
    • https://cdn.shopify.com/s/files/1/0430/5823/3493/files/wupufazewe.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/xokuwunojuvilil.pdf
    • https://cdn.shopify.com/s/files/1/0437/0549/9801/files/dafobiterasodanokagosi.pdf
    • https://cdn.shopify.com/s/files/1/0432/4474/8950/files/57250799222.pdf
    • https://cdn.shopify.com/s/files/1/0431/6191/1458/files/61793255844.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_off000089f5.bin
5e1cb0b685e9014988cf4bff015cafc7c14f35b9d2ada8cb2e68f2b406b374ce		 pdf-font-stream PDF embedded font (sfnt) at offset 0x89F5 5240 bytes
font_01_sfnt_off00009be4.bin
a6d90d4dc5cbe8cfce1b483b596e78963e2163629a3b39e1bc992f1f6b06c5ff		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9BE4 12720 bytes

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