Malicious PDF — malware analysis report

Static analysis result for SHA-256 fa155d08de2d5c0f…

MALICIOUS

PDF

51.0 KB Created: 2020-08-06 20:46:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c787bed87e3fc8d7e77caea0b6bd76b5 SHA-1: bd5d28748658167ac82f6ae3af181b8136a49fe6 SHA-256: fa155d08de2d5c0f4c997f9b86d0a7d0525b7ceaabf36453323c5496235f1f36
152 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'ttraff.cc'. The document body, though heavily obfuscated, contains the same URL and text related to a worksheet, suggesting a lure. The PDF also exhibits characteristics of a link farm, with numerous embedded URLs, many pointing to Shopify domains, likely for SEO manipulation or to host further malicious content. No scripts were extracted from this sample.

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=slavery+by+another+name+video+worksheet+answer+key+pdf
    • http://files.eugenetoolboxproject.org/uploads/1/3/2/6/132681757/xojilega.pdf
    • http://files.sammileedavis.com/uploads/1/3/1/8/131872238/9d031d5.pdf
    • http://files.boozybotanicalskc.com/uploads/1/3/1/3/131380107/sububugir_lojoluxu.pdf
    • http://files.wilberforcelodge.org/uploads/1/3/1/3/131379833/fajubuwalod.pdf
    • http://files.mjcards.com/uploads/1/3/1/3/131384374/pupufetiwesiroje.pdf
    • https://cdn.shopify.com/s/files/1/0437/5108/0085/files/nunabu.pdf
    • https://cdn.shopify.com/s/files/1/0434/9159/0308/files/alter_ego_b1_guide_pdagogique_gratuit.pdf
    • https://cdn.shopify.com/s/files/1/0435/9428/5218/files/70945307739.pdf
    • https://cdn.shopify.com/s/files/1/0434/7081/5397/files/jitaladomutosokokefuruj.pdf
    • https://cdn.shopify.com/s/files/1/0434/6295/1062/files/inductive_and_deductive_reasoning_exercises.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/78030006053.pdf
    • https://cdn.shopify.com/s/files/1/0434/5433/3093/files/zofegirufaragagimid.pdf
    • https://cdn.shopify.com/s/files/1/0438/3087/0173/files/nawabupone.pdf
    • https://cdn.shopify.com/s/files/1/0429/6415/6582/files/8236602672.pdf
    • https://cdn.shopify.com/s/files/1/0431/4136/5922/files/dizupigoma.pdf
    • https://cdn.shopify.com/s/files/1/0430/5282/6773/files/83613859468.pdf
    • https://cdn.shopify.com/s/files/1/0433/1841/1417/files/kewetitomepuralatu.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_off00008830.bin
20c1225a7653a603d7859839d16c67755db40c10a8b0703d5d6abb4c95849f91		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8830 5844 bytes
font_01_sfnt_off00009bfd.bin
ee6591df8d041c2e3e8487aaea712b39498464e6e458a5938dcd13ec8b1bcf62		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9BFD 10040 bytes

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