Malicious PDF — malware analysis report

Static analysis result for SHA-256 07e04507c069f4ae…

MALICIOUS

PDF

51.0 KB Created: 2020-07-31 07:49:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8e9ff1399e5f314b9055eea374263a81 SHA-1: 5b95953dce8d64925e7306e7d3a53b01740530bc SHA-256: 07e04507c069f4ae93a40df9bb1463691dc8724a7f949853685dbd05187d9a33
154 Risk Score

Malware Insights

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

The PDF contains embedded links that redirect to malicious infrastructure, specifically identified by the 'PDF_MALICIOUS_REDIRECTOR_LINK' heuristic. The document body, though heavily obfuscated, suggests a lure related to 'Bihari ke dohe' and mentions wkhtmltopdf, indicating it was likely generated programmatically. The presence of numerous external PDF links further supports a link farm or SEO manipulation tactic, often used to distribute malicious content.

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=bihari+ke+dohe+pdf
    • http://files.raingirlphotos.com/uploads/1/3/1/4/131453387/2540150.pdf
    • http://files.eleanormccormick.co.uk/uploads/1/3/0/8/130813827/8756444.pdf
    • http://files.badgerthebichon.com/uploads/1/3/1/4/131454286/e99e621519917.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://fedorahosted.org/lohit
    • https://cdn.shopify.com/s/files/1/0440/2741/2645/files/dawinuvexosonawakofusa.pdf
    • https://cdn.shopify.com/s/files/1/0430/9798/1082/files/47510297498.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/babasetaxoguvivowe.pdf
    • https://cdn.shopify.com/s/files/1/0434/4391/2854/files/71331860652.pdf
    • https://cdn.shopify.com/s/files/1/0428/4622/4551/files/26824507291.pdf
    • https://cdn.shopify.com/s/files/1/0431/4926/2997/files/mokakotaj.pdf
    • https://cdn.shopify.com/s/files/1/0431/7849/2062/files/45262604871.pdf
    • https://cdn.shopify.com/s/files/1/0437/9541/5189/files/80051669151.pdf
    • https://cdn.shopify.com/s/files/1/0440/6552/1814/files/87231446733.pdf
    • https://cdn.shopify.com/s/files/1/0432/7938/4744/files/75069310144.pdf
    • https://cdn.shopify.com/s/files/1/0433/9073/0405/files/63372193476.pdf
    • https://cdn.shopify.com/s/files/1/0437/6592/3992/files/93738432974.pdf
    • https://cdn.shopify.com/s/files/1/0427/9464/7719/files/gujezeduzudadugesu.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007389.bin
a4f0beed384534ebf84322c5a3160e674064468badb37f9f5bc9606e675f5225		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7389 4632 bytes
font_01_sfnt_off00008353.bin
82336ac09b0ba91311086c1ebee46170e14815156be866f92400b7ec4d5676a9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8353 13916 bytes
font_02_sfnt_off0000b044.bin
38d2b1c030f8268fbb276f27b76b19411d6a9542f2a74c35bcc5dac818235485		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB044 3928 bytes

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