Malicious PDF — malware analysis report

Static analysis result for SHA-256 0efd86807ddd6868…

MALICIOUS

PDF

43.5 KB Created: 2020-08-24 04:20:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 677504dbbabee7ecde827f8480785c2d SHA-1: 783958bcd4967a2798d27d8825c6adf707b59b12 SHA-256: 0efd86807ddd6868904ff128a57acbc9194860c1f5ac9f3246aa0b0d83042a85
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many pointing to Shopify domains hosting PDF files, which is indicative of a link farm. One critical heuristic identified a link to known malicious redirector infrastructure, specifically 'ttraff.cc', which is used to obscure the final destination. The ML classifier also strongly flagged this PDF as malicious. While no scripts were extracted, the presence of a malicious redirector and a link farm suggests an attempt to lure users to malicious content, 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=android+espresso+wait+for+view+to+disappear
    • http://files.mytornradiofud2modelproject.com/uploads/1/3/1/3/131380337/jaxexiditapid-tusux.pdf
    • http://files.counselingservicesknoxville.com/uploads/1/3/0/8/130813769/polozixod-sozenavisovux-tufajobudozo-voluju.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0437/5461/9041/files/tonolisenis.pdf
    • https://cdn.shopify.com/s/files/1/0429/6127/2983/files/77886554917.pdf
    • https://cdn.shopify.com/s/files/1/0437/8948/4189/files/zevab.pdf
    • https://cdn.shopify.com/s/files/1/0443/0246/7228/files/emerald_tablets_of_hermes.pdf
    • https://cdn.shopify.com/s/files/1/0435/8357/0078/files/chippewa_flowage_fishing_report.pdf
    • https://cdn.shopify.com/s/files/1/0430/3018/4098/files/3164772618.pdf
    • https://cdn.shopify.com/s/files/1/0440/7368/1061/files/53651050401.pdf
    • https://cdn.shopify.com/s/files/1/0431/0974/4789/files/eq_paladin_spells.pdf
    • https://cdn.shopify.com/s/files/1/0430/4486/4149/files/learn_french_book_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0428/4809/2327/files/13735178374.pdf
    • https://cdn.shopify.com/s/files/1/0432/0460/8155/files/13730418420.pdf
    • https://cdn.shopify.com/s/files/1/0434/8257/9110/files/zugafitade.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_off00006af0.bin
15fa21d4dfb75fd4975431f850191ab5fb7e34acc330d1c1c87d780ca3168a99		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6AF0 5144 bytes
font_01_sfnt_off00007c94.bin
1e92e27ecccaf24dc8acfaf08faea44c26bfc1c18f7df16796f5a45d049fe520		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7C94 10676 bytes

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