Malicious PDF — malware analysis report

Static analysis result for SHA-256 7379da446fb5b509…

MALICIOUS

PDF

45.6 KB Created: 2020-08-01 17:02:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9078b55b3e9d567781b8c1b579fdceb8 SHA-1: 35fc70c0c7746f8d53f9d52c80339998696ff575 SHA-256: 7379da446fb5b509285d5d1b64b51c5bcad900a344cdec419bda352b9f315413
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, disguised with a lure related to "Dj punjab song". The PDF also hosts a large number of other PDF links, suggesting a link farm or SEO poisoning attempt. While no scripts were explicitly extracted, the PDF structure and embedded links indicate a malicious intent to redirect users to harmful content, likely as part of a phishing or malware distribution scheme.

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.cc/pify?keyword=dj+punjab+song
    • http://files.studiobeeproductions.com/uploads/1/3/1/8/131856852/9931820.pdf
    • http://files.wingsofhopemankato.com/uploads/1/3/2/6/132695568/famixaduful_fexeziwudon.pdf
    • http://files.jennyjohnsonart.com/uploads/1/3/0/8/130873717/5600255.pdf
    • http://files.justuschildrenbooks.com/uploads/1/3/0/7/130740477/709d4.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0432/0549/2904/files/48415393341.pdf
    • https://cdn.shopify.com/s/files/1/0435/0027/3830/files/velidexowegosotosazazinan.pdf
    • https://cdn.shopify.com/s/files/1/0429/8450/5498/files/wesiribeda.pdf
    • https://cdn.shopify.com/s/files/1/0440/7679/4021/files/7824246131.pdf
    • https://cdn.shopify.com/s/files/1/0432/6568/7717/files/88937488932.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/56802730071.pdf
    • https://cdn.shopify.com/s/files/1/0435/8782/9928/files/4483624058.pdf
    • https://cdn.shopify.com/s/files/1/0430/6986/6141/files/mofekikapogogigefomitaxos.pdf
    • https://cdn.shopify.com/s/files/1/0435/1839/4523/files/zaidu_vokrug_rta.pdf
    • https://cdn.shopify.com/s/files/1/0432/8656/0936/files/pigugegupimexaputuk.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_off00005ef0.bin
bd1098da76e8da0026c3ba27ae87d4071e1450efb5cf8e562b01c7141e6e17a1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5EF0 4712 bytes
font_01_sfnt_off00006ef2.bin
514d1a6a483dcdf307d817b6adb18a34c035dd04d7808c4f55b8668fc3c0c148		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6EF2 13844 bytes
font_02_sfnt_off000099d3.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x99D3 4324 bytes

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