Malicious PDF — malware analysis report

Static analysis result for SHA-256 09cb1fcfa27760cb…

MALICIOUS

PDF

45.2 KB Created: 2020-08-19 14:02:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 86db3aace4e62760f8aa70ee328a9710 SHA-1: 1d28339eec165fdc0cecc67dfeb4f4f41c5036ba SHA-256: 09cb1fcfa27760cbaafe11385386b628476f62c944406a8cd895854850c0d84e
154 Risk Score

Malware Insights

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

The PDF contains numerous links, including one pointing to a known malicious redirector, suggesting an attempt to direct users to malicious content. The document body, though heavily obfuscated, contains keywords related to a camera app and includes the malicious URL, reinforcing the lure. The ML classifier also strongly indicated 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=google+camera+for+redmi+note+7+apk
    • http://files.foodallergiesrochestermn.org/uploads/1/3/1/4/131453493/2de858d1.pdf
    • http://xidebux.printcharlotte.net/uploads/1/3/1/8/131858156/2749040.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0429/5180/3033/files/24355307244.pdf
    • https://cdn.shopify.com/s/files/1/0434/4011/1782/files/zixiluloduwizim.pdf
    • https://cdn.shopify.com/s/files/1/0429/0700/9180/files/acquisitions_incorporated_the_eye.pdf
    • https://cdn.shopify.com/s/files/1/0433/0127/3758/files/529113576.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/17844710077.pdf
    • https://cdn.shopify.com/s/files/1/0435/5699/5233/files/dasululudidud.pdf
    • https://cdn.shopify.com/s/files/1/0439/0774/3899/files/piwix.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/5552762143.pdf
    • https://cdn.shopify.com/s/files/1/0438/1035/7405/files/rubazabujine.pdf
    • https://cdn.shopify.com/s/files/1/0431/7108/6485/files/zonaviginafuka.pdf
    • https://cdn.shopify.com/s/files/1/0427/8213/0332/files/siwowiwimi.pdf
    • https://cdn.shopify.com/s/files/1/0431/6486/0575/files/koratatuxodapopabomerix.pdf
    • https://cdn.shopify.com/s/files/1/0437/7975/2087/files/holmes_and_watson_review_parents_guide.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_off00006e72.bin
2777850c6a996e7aa7657b5e2273faa4e850e88753cd416b7b0db7201fc151d8
pdf-font-stream PDF embedded font (sfnt) at offset 0x6E72 5472 bytes
font_01_sfnt_off00008108.bin
ca94e679c2b95a301ffdf6e22b1568639861733e32f7ae9bc780d7b9b51005d4
pdf-font-stream PDF embedded font (sfnt) at offset 0x8108 12196 bytes