Malicious PDF — malware analysis report

Static analysis result for SHA-256 76f97728d6b2c04d…

MALICIOUS

PDF

35.5 KB Created: 2020-08-01 19:41:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b6605bc84329d2147930650ac37586b3 SHA-1: 945ee4e207c7b3ff42467f2cf45debb8a8c69fea SHA-256: 76f97728d6b2c04d73f61bb0dd006823f7ccf00845e8eea71086bf82985a804b
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains a large number of embedded links, many of which are disguised as legitimate files hosted on Shopify. However, analysis reveals that these links ultimately redirect to malicious infrastructure, specifically 'ttraff.com'. The presence of a malicious redirector and a link farm indicates an attempt to lure users to malicious content, likely for phishing or malware distribution. The ML classifier also strongly flagged this PDF as malicious.

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=total+line+thermostat
    • http://files.jillbealephotography.com/uploads/1/3/0/9/130969057/5519044.pdf
    • http://files.templetattoo.co.uk/uploads/1/3/0/8/130874058/rumifaf.pdf
    • http://files.trinitydentalcentre.ca/uploads/1/3/0/7/130775063/nurib.pdf
    • http://files.charlestonctc.com/uploads/1/3/0/7/130740591/bokob.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/5305/5128/files/22654939359.pdf
    • https://cdn.shopify.com/s/files/1/0430/6924/3553/files/binuvoz.pdf
    • https://cdn.shopify.com/s/files/1/0432/9403/2025/files/tidifawolizizorimimikit.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/nasidobedibugamis.pdf
    • https://cdn.shopify.com/s/files/1/0431/5948/6626/files/tuxutoxubadikivivupesukiv.pdf
    • https://cdn.shopify.com/s/files/1/0432/2269/6096/files/juzezusipur.pdf
    • https://cdn.shopify.com/s/files/1/0429/9954/6009/files/vazidotuwigawanefewa.pdf
    • https://cdn.shopify.com/s/files/1/0432/3095/3630/files/kuviwolutofidideloba.pdf
    • https://cdn.shopify.com/s/files/1/0434/4774/6721/files/39256252209.pdf
    • https://cdn.shopify.com/s/files/1/0435/3343/5032/files/gopopimegunuzago.pdf
    • https://cdn.shopify.com/s/files/1/0436/8180/8549/files/37986846031.pdf
    • https://cdn.shopify.com/s/files/1/0437/8161/9873/files/winotuzoxoxet.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_off00004db9.bin
c3318aa6c08d343d299c7eabc3be436b7eee309618660ab70db83b19cb9c17dd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4DB9 4876 bytes
font_01_sfnt_off00005e18.bin
61bde063c44cdf5d0fbddf5bef083e9323bfacf08d0bd8caae66b3c08905bef6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5E18 10324 bytes

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