Malicious PDF — malware analysis report

Static analysis result for SHA-256 4b13e0ebd225b639…

MALICIOUS

PDF

58.5 KB Created: 2020-08-07 02:40:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cb5ac03e0d683abb0f9035bcd02edc00 SHA-1: 791212108fc7a76dabf656193e481425e6de57f2 SHA-256: 4b13e0ebd225b6390b8490cebecfccc509836f15488ea671ddf1c85b8e4a9adc
152 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell T1566.002 Spearphishing Attachment

The PDF contains multiple embedded links, with one pointing to a known malicious redirector at 'ttraff.ru'. This redirector is likely used to obscure the final malicious destination. The document body, though heavily obfuscated, contains references to the redirector URL and other URLs hosted on Shopify, suggesting a link farm or content delivery network used to host malicious PDFs. The ML classifier strongly indicates maliciousness.

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=two+dimensional+array+in+java+pdf
    • http://files.dreamtravellovebyluana.com/uploads/1/3/1/0/131070567/sudusipiz_dazowanovobajol.pdf
    • http://files.sophieduffy.com/uploads/1/3/0/9/130969061/disibozugonejudenod.pdf
    • http://libakume.ieatoutloud.com/uploads/1/3/0/8/130814229/wisugalanadoxi_vitevizos_pubifatumove_veditajedu.pdf
    • http://kugur.spiritofthe8thfire.com/uploads/1/3/1/4/131438137/movulax_mewuvovor_zoromi.pdf
    • http://mewokege.kathywhitephotog.com/uploads/1/3/1/1/131163599/pevuterad.pdf
    • https://cdn.shopify.com/s/files/1/0432/3724/5085/files/tudetabogiwugex.pdf
    • https://cdn.shopify.com/s/files/1/0429/9826/8065/files/zagamoxokeze.pdf
    • https://cdn.shopify.com/s/files/1/0440/2115/3957/files/67043673729.pdf
    • https://cdn.shopify.com/s/files/1/0432/7673/0533/files/gubevajizowizinajobijoki.pdf
    • https://cdn.shopify.com/s/files/1/0440/7577/8198/files/pear_to_pear.pdf
    • https://cdn.shopify.com/s/files/1/0434/6114/8837/files/bakerenebazesowogep.pdf
    • https://cdn.shopify.com/s/files/1/0431/6538/4866/files/14408217057.pdf
    • https://cdn.shopify.com/s/files/1/0440/4704/0662/files/58170819360.pdf
    • https://cdn.shopify.com/s/files/1/0431/5784/8224/files/kuwigafumigusovawem.pdf
    • https://cdn.shopify.com/s/files/1/0437/8689/5512/files/xutemuzojejutipakepube.pdf
    • https://cdn.shopify.com/s/files/1/0435/1072/6815/files/antrenmanlarla_matematik_4_2020.pdf
    • https://cdn.shopify.com/s/files/1/0428/3957/2643/files/54693426851.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00009ad0.bin
e71271f9bc6324ef4ad8e21eb19a163dc2201183c9388495f5d402530cd70117		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9AD0 5468 bytes
font_01_sfnt_off0000ad6f.bin
789392347bc060246ef986cfde82f64e776faed3438f1ba81bc6c87c37b7d859		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAD6F 14884 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.