Malicious PDF — malware analysis report

Static analysis result for SHA-256 64206629bc616cb6…

MALICIOUS

PDF

52.4 KB Created: 2020-08-11 00:40:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c23affb5674148ff3e0191f5edbd8c80 SHA-1: 3efc941c8c2195a82f91cb972700ccdf74ac392f SHA-256: 64206629bc616cb612330faf2b6a600a3b9b3f30fd6cc64a3e32400c3db0dce2
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 a redirector infrastructure. The primary malicious URL identified is https://ttraff.ru/pify?keyword=cantidad+de+liquido+amniotico+normal+pdf, which is flagged as a malicious redirector. The document body and embedded links suggest a tactic to drive traffic to potentially malicious sites under the guise of providing PDF documents.

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=cantidad+de+liquido+amniotico+normal+pdf
    • http://fifilagim.naturetherapyonline.com/uploads/1/3/1/8/131856706/ratopelekadeni.pdf
    • http://files.liftislandfashion.com/uploads/1/3/1/6/131606807/604476e2.pdf
    • http://files.publichealthmuseum.org/uploads/1/3/1/3/131384789/a826b1b39.pdf
    • http://files.sarahulan.com/uploads/1/3/1/3/131398253/6546742.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0437/4924/5082/files/69265264068.pdf
    • https://cdn.shopify.com/s/files/1/0434/1297/9879/files/ubuntu_automatic_logon.pdf
    • https://cdn.shopify.com/s/files/1/0440/8590/3510/files/athlean_x_meal_plan_download.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/pajakeveposemilakojataza.pdf
    • https://cdn.shopify.com/s/files/1/0431/7003/7924/files/dibakapekut.pdf
    • https://cdn.shopify.com/s/files/1/0432/6644/1376/files/d_d_eberron_campaign_setting.pdf
    • https://cdn.shopify.com/s/files/1/0430/3588/5725/files/logopuw.pdf
    • https://cdn.shopify.com/s/files/1/0430/7720/6178/files/runezobesunepifazivaxe.pdf
    • https://cdn.shopify.com/s/files/1/0428/4809/2323/files/fafijewekolonofodal.pdf
    • https://cdn.shopify.com/s/files/1/0434/9722/6402/files/67167098928.pdf
    • https://cdn.shopify.com/s/files/1/0435/6459/7397/files/amino_acids_classification.pdf
    • https://cdn.shopify.com/s/files/1/0434/3542/5944/files/85477750777.pdf
    • https://cdn.shopify.com/s/files/1/0430/7176/6690/files/33299120191.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000702c.bin
7c54c13321a22b13e8c8cf75e560e9151677e82cfd7fb4553fa360d909f90a16		 pdf-font-stream PDF embedded font (sfnt) at offset 0x702C 3304 bytes
font_01_sfnt_off00007c11.bin
e7ca25324bfcd5476a4f6d8795d9617e48909841d3098c95f766203bbd6bc672		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7C11 5156 bytes
font_02_sfnt_off00008d79.bin
8c6e9b3a1ee826398e0210a1ab169c631a0d37be8345b4bbb1d5f7c790033a31		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8D79 11756 bytes
font_03_sfnt_off0000b3a6.bin
cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB3A6 4324 bytes

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