Malicious PDF — malware analysis report

Static analysis result for SHA-256 5ad2a35a97c5c865…

MALICIOUS

PDF

72.2 KB Created: 2020-08-03 20:55:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 190b05bb085ad39f4fd00c7e78c97ff4 SHA-1: 86a5af51a2b71ea0ead1eac983afd664adbedf55 SHA-256: 5ad2a35a97c5c865b8f2d12d0fc10632c6353fcdd2a7aeb85eee1af6859dea43
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 known for malicious activity. The document body, though heavily obfuscated, contains the URL https://ttraff.cc/pify?keyword=difference+between+manual+and+automatic+film+processing+pdf, which is also flagged as a malicious redirector. This suggests the document is designed to lead users to potentially harmful websites, likely for phishing or malware distribution.

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=difference+between+manual+and+automatic+film+processing+pdf
    • http://files.andyabram.co.uk/uploads/1/3/1/0/131070973/7428439.pdf
    • http://files.drclaudetteking.com/uploads/1/3/1/4/131408502/c8dd9.pdf
    • http://files.ksmithla.com/uploads/1/3/1/4/131406717/7ee3e57e.pdf
    • http://fontawesome.iohttp://fontawesome.io/license/
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0435/7426/3963/files/morilosuru.pdf
    • https://cdn.shopify.com/s/files/1/0429/2031/2991/files/86549415503.pdf
    • https://cdn.shopify.com/s/files/1/0435/9041/8591/files/nenavibokubiza.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/9680354999.pdf
    • https://cdn.shopify.com/s/files/1/0430/5597/2506/files/botw_max_hearts_and_stamina.pdf
    • https://cdn.shopify.com/s/files/1/0430/9906/2421/files/86313132411.pdf
    • https://cdn.shopify.com/s/files/1/0437/8296/3349/files/18855913155.pdf
    • https://cdn.shopify.com/s/files/1/0436/7548/4313/files/xuvozibu.pdf
    • https://cdn.shopify.com/s/files/1/0436/4402/7038/files/md_form_510.pdf
    • https://cdn.shopify.com/s/files/1/0431/0705/7825/files/dakov.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/xizujebekox.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/27622062760.pdf
    • https://cdn.shopify.com/s/files/1/0428/5032/0543/files/lowevagakaxewomugabo.pdf
    • https://cdn.shopify.com/s/files/1/0430/7851/6885/files/buxeruzika.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_off0000d014.bin
d386d43a0acb803e672c9a07a6d3dd4be0ef86a9819c95bcdbd4f346483cf0f1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD014 2320 bytes
font_01_sfnt_off0000da6d.bin
cf0e4b135297037a22f6eafe5de5fc63e03dbc43d3b908b0070fd859c9a7dea0		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDA6D 5708 bytes
font_02_sfnt_off0000edcf.bin
8a28b8bb5ecb38f68fa0f9947a03b275c2809d59f97e08f02a7f763e8331b307		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEDCF 10788 bytes

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