Malicious PDF — malware analysis report

Static analysis result for SHA-256 abcfee162938a758…

MALICIOUS

PDF

38.0 KB Created: 2020-08-21 22:23:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d8741d2e33a9ea47874d0e62a7928b47 SHA-1: 3b7f2741b75566624cf031686974bf8dfa894e70 SHA-256: abcfee162938a758461c9a39a67f99190ac5c5530e3a130197c54f7a40485bd0
152 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.ru, which is likely intended to lead the user to a malicious site. The document body, though heavily obfuscated, contains keywords related to 'whatsapp status bollywood movie video' and the redirector URL, suggesting a social engineering lure. The presence of numerous PDF links, many hosted on Shopify, indicates a link farm strategy, likely to obscure the ultimate destination. No scripts were extracted, but the PDF structure and embedded links strongly suggest a phishing or redirection attack.

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=whatsapp+status+bollywood+movie+video
    • http://pakobo.mtgreenwoodcrafts.co.uk/uploads/1/3/1/4/131406821/zosixovozasaw.pdf
    • https://cdn.shopify.com/s/files/1/0428/8220/3801/files/pezilinaguzunezufiwavo.pdf
    • https://cdn.shopify.com/s/files/1/0434/8870/6717/files/html_to._net_core_2.pdf
    • https://cdn.shopify.com/s/files/1/0434/0485/3402/files/addiction_solitaire_free.pdf
    • https://cdn.shopify.com/s/files/1/0437/6428/5601/files/27970275057.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/65817182127.pdf
    • https://cdn.shopify.com/s/files/1/0437/1306/9210/files/multiplication_strategies_4th_grade_worksheets.pdf
    • https://cdn.shopify.com/s/files/1/0439/7514/7678/files/gekajavedigovebakigozofir.pdf
    • https://cdn.shopify.com/s/files/1/0432/4923/8178/files/junetusovasipoto.pdf
    • https://cdn.shopify.com/s/files/1/0437/2309/6216/files/siverikevasifodajit.pdf
    • https://cdn.shopify.com/s/files/1/0433/3702/3641/files/aggravation_rules.pdf
    • https://cdn.shopify.com/s/files/1/0462/1638/0570/files/fivepefega.pdf
    • https://cdn.shopify.com/s/files/1/0445/8138/8452/files/assignment_method.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004eea.bin
a544ad266d29e162071f8b5b337bb3f4d461f16cf34165419f013504b45ab888		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4EEA 5508 bytes
font_01_sfnt_off00006198.bin
c74da10e25a9251d52ae2b68302090f201ceff64063b67354136e8aabb2765af		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6198 1764 bytes
font_02_sfnt_off00006a61.bin
c66273d851c4012bcaf16e34128ffb06884b1d7fba56ffbab7f34efe288847b7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6A61 9448 bytes

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