Malicious PDF — malware analysis report

Static analysis result for SHA-256 13f9403ccdd2e644…

MALICIOUS

PDF

74.2 KB Created: 2020-08-06 12:26:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1d039ec302cb526ce9832314531fd9c7 SHA-1: ee84437a40292028c863493a4652904badc33c18 SHA-256: 13f9403ccdd2e64444a83f9890c4e9dbc38943c264254f640b107f54a4b8cb59
154 Risk Score

Malware Insights

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

The PDF contains embedded links, with one pointing to a known malicious redirector infrastructure. The document body, though heavily obfuscated, contains a URL that appears to be the same as the malicious redirector. This suggests the document is designed to trick users into visiting a malicious site, likely for phishing or malware distribution.

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/pify?keyword=restrictive+cardiomyopathy+guidelines+pdf
    • http://files.indianhockeyskills.com/uploads/1/3/0/8/130814717/7919cf.pdf
    • http://files.southorndollstylequeen.com/uploads/1/3/1/4/131438891/65f4b7e06db.pdf
    • http://files.plumbcogroup.com/uploads/1/3/0/7/130775027/memelotej.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0433/6893/9672/files/19830778835.pdf
    • https://cdn.shopify.com/s/files/1/0430/4447/0945/files/kotiginikoronuranoduted.pdf
    • https://cdn.shopify.com/s/files/1/0437/3915/2535/files/39705810776.pdf
    • https://cdn.shopify.com/s/files/1/0435/8144/0168/files/vudolutodesisidifopajevil.pdf
    • https://cdn.shopify.com/s/files/1/0431/6335/3244/files/16646069001.pdf
    • https://cdn.shopify.com/s/files/1/0432/1047/3633/files/fewefogapefatopi.pdf
    • https://cdn.shopify.com/s/files/1/0437/1103/7591/files/newly_wed_question.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/favubedezemopazejive.pdf
    • https://cdn.shopify.com/s/files/1/0440/3786/5637/files/56112061970.pdf
    • https://cdn.shopify.com/s/files/1/0437/7998/1470/files/life_orb_gungeon.pdf
    • https://cdn.shopify.com/s/files/1/0430/0944/1953/files/50351785973.pdf
    • https://cdn.shopify.com/s/files/1/0435/6423/6968/files/bobcat_610_parts_manual.pdf
    • https://cdn.shopify.com/s/files/1/0428/5769/3347/files/bsmrstu_question_bank_download.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/85286147205.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c19f.bin
2cd3183968d00f5665a9599e92f8891fe53d25e0842a18d4f5227f9c5f347d16		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC19F 5620 bytes
font_01_sfnt_off0000d4a8.bin
ae69340e03c61c935a6b9b91ee3024c35400f3e34fd534fc3cca02a1044b7373		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD4A8 10208 bytes
font_02_sfnt_off0000f7b8.bin
aabbb95e4258a1bccfe6759090a0a8b97a33e8154131110566ffb2eaa8fdb080		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF7B8 16148 bytes
font_03_sfnt_off00010cae.bin
1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10CAE 4324 bytes

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