Malicious PDF — malware analysis report

Static analysis result for SHA-256 5b19e2b3965dfc1c…

MALICIOUS

PDF

47.6 KB Created: 2020-07-28 18:57:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ab5fa552b8926612ef2ecfe3c55537c8 SHA-1: d96b981c6d6b784ac291b6fd72bbf4c76ba4d9ed SHA-256: 5b19e2b3965dfc1c5f496dfaeae0ec63f437ecfd0e9d4e8a35b6ff56819ea683
154 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to a redirector service. The document body, though heavily obfuscated, appears to be a lure related to song titles, suggesting a phishing or scam attempt. The ML classifier strongly indicates maliciousness, and the presence of a redirector URL is a high-confidence indicator of malicious intent.

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=allahabad+kondapuram+songs+ing+naa+songs
    • http://files.cauchonphoto.com/uploads/1/3/1/3/131379540/5469489.pdf
    • http://files.nslimgoodies.com/uploads/1/3/2/7/132740342/guvesarumozekom_waxabivewe.pdf
    • http://files.4ufurnituredesign.com/uploads/1/3/1/6/131636570/gatidaxufo.pdf
    • http://files.tameraboundsforcitycouncil.com/uploads/1/3/1/4/131438177/ratodatali.pdf
    • http://files.mountainlakewinery.com/uploads/1/3/0/7/130740174/xosog_wakapit.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/3603/2680/files/61158537071.pdf
    • https://cdn.shopify.com/s/files/1/0435/4041/4615/files/66275010875.pdf
    • https://cdn.shopify.com/s/files/1/0434/2074/5893/files/fawowozuseluxubopenagexu.pdf
    • https://cdn.shopify.com/s/files/1/0428/0962/2687/files/97276503277.pdf
    • https://cdn.shopify.com/s/files/1/0439/2937/0779/files/funowukuniremokane.pdf
    • https://cdn.shopify.com/s/files/1/0430/9997/9930/files/7144895719.pdf
    • https://cdn.shopify.com/s/files/1/0432/3698/2952/files/tixewubenixano.pdf
    • https://cdn.shopify.com/s/files/1/0434/7016/0032/files/39375968198.pdf
    • https://cdn.shopify.com/s/files/1/0435/1003/8683/files/bakumepogivozulitewegubi.pdf
    • https://cdn.shopify.com/s/files/1/0435/7285/4939/files/vobujigajemededojukar.pdf
    • https://cdn.shopify.com/s/files/1/0432/0041/3856/files/nimowiwizowexovi.pdf
    • https://cdn.shopify.com/s/files/1/0433/9597/3271/files/pokaxokezulugumunabovizoj.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_off00007acd.bin
d110e1dafe8412d9b5cb2e1dc68255f187a160f17662354147ef49f7610b3835		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7ACD 5252 bytes
font_01_sfnt_off00008c59.bin
39bc2ffd892955b66c1d937594fdb62be9a7241a2ed20e4f94fad71a539e519a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8C59 11096 bytes

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