Malicious PDF — malware analysis report

Static analysis result for SHA-256 1dd1ab483a207920…

MALICIOUS

PDF

41.4 KB Created: 2020-08-12 03:57:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b46f9cb18a1b0b0205ba69b907650811 SHA-1: 75d3dec513980754d2a3903fdff130479d97064e SHA-256: 1dd1ab483a207920fb167891daee61436cd7f8a2c0d87a365cd46eecf4f336fe
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of embedded links, many of which point to a link farm hosted on Shopify, likely for SEO poisoning. One prominent link redirects through ttraff.com, a known malicious redirector, to a lure related to a programming book. This indicates a phishing or scam attempt designed to drive traffic to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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=thinking+in+java+pdf+6th+edition
    • http://girased.carnivalglassworldwide.com/uploads/1/3/2/7/132740541/2a093954a1d.pdf
    • http://files.swiminfoct.com/uploads/1/3/0/8/130874055/079c104b.pdf
    • http://files.hassankingsberry.com/uploads/1/3/0/9/130969761/3653335.pdf
    • http://vafexav.poetart.org/uploads/1/3/1/3/131380005/miwarixijeg.pdf
    • https://cdn.shopify.com/s/files/1/0430/0213/4681/files/7032993454.pdf
    • https://cdn.shopify.com/s/files/1/0434/2651/3048/files/31671532796.pdf
    • https://cdn.shopify.com/s/files/1/0433/4570/7166/files/65257964772.pdf
    • https://cdn.shopify.com/s/files/1/0434/1124/3164/files/bunum.pdf
    • https://cdn.shopify.com/s/files/1/0430/6314/8706/files/lebimiv.pdf
    • https://cdn.shopify.com/s/files/1/0431/6381/2004/files/aprender_a_dibujar_manga_desde_cero.pdf
    • https://cdn.shopify.com/s/files/1/0428/9894/8255/files/19308088252.pdf
    • https://cdn.shopify.com/s/files/1/0437/3191/0810/files/rexosekute.pdf
    • https://cdn.shopify.com/s/files/1/0435/7485/3793/files/dell_dimension_3100.pdf
    • https://cdn.shopify.com/s/files/1/0432/2797/1741/files/do_androids_dream_of_electric_sheep_graphic_novel.pdf
    • https://cdn.shopify.com/s/files/1/0430/8657/7818/files/miwojowataw.pdf
    • https://cdn.shopify.com/s/files/1/0433/3387/7915/files/61263486854.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000063c9.bin
6ccb861642217f8c84e538f332c07e98cb1c71e82257058f198b82cb847b195c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x63C9 5300 bytes
font_01_sfnt_off000075d9.bin
95fe15e357f9860d893ab0aa4d94236f0a4826f80a75a8874ad62c3d218086eb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x75D9 10220 bytes

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