Malicious PDF — malware analysis report

Static analysis result for SHA-256 514375a05b1e62dd…

MALICIOUS

PDF

64.7 KB Created: 2020-08-12 21:14:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e10480033dc8c05fa9533dead93e09ac SHA-1: e429deff211001914c32c695cc8be1182627dfa8 SHA-256: 514375a05b1e62dd3bb3e10d7df9ae088205ef2b6497f3d6d8466743a9215512
154 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 text related to an 'emotional intelligence test free pdf' and the URL itself. This suggests a phishing or scam attempt to redirect users to malicious content. The PDF also contains a large number of external links, many pointing to Shopify, which is flagged as a link farm.

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=emotional+intelligence+test+free+pdf
    • http://files.mcmjanitorial.com/uploads/1/3/1/4/131406356/5b2cce2e6e7ba.pdf
    • http://files.leblancconsulting.net/uploads/1/3/0/8/130874304/desobedut.pdf
    • http://files.chicagoschoolofgrappling.com/uploads/1/3/1/4/131409170/312064.pdf
    • https://cdn.shopify.com/s/files/1/0432/2364/6365/files/differences_between_c_and_c.pdf
    • https://cdn.shopify.com/s/files/1/0432/5844/5979/files/kovirugemitotusofug.pdf
    • https://cdn.shopify.com/s/files/1/0432/2210/6271/files/body_image_worksheet.pdf
    • https://cdn.shopify.com/s/files/1/0434/5711/8374/files/spotify_error_code_17.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/34888362351.pdf
    • https://cdn.shopify.com/s/files/1/0431/2009/9488/files/2005_ford_explorer_repair_manual.pdf
    • https://cdn.shopify.com/s/files/1/0434/4302/8120/files/lerefepax.pdf
    • https://cdn.shopify.com/s/files/1/0430/1520/9123/files/11411810540.pdf
    • https://cdn.shopify.com/s/files/1/0434/4774/6721/files/65104853531.pdf
    • https://cdn.shopify.com/s/files/1/0429/3004/5091/files/sea_doo_repairs.pdf
    • https://cdn.shopify.com/s/files/1/0432/7093/0600/files/fatogizifago.pdf
    • https://cdn.shopify.com/s/files/1/0434/6504/8229/files/sapugexekojifoke.pdf
    • https://cdn.shopify.com/s/files/1/0431/6315/6641/files/gst_tax_list.pdf
    • https://cdn.shopify.com/s/files/1/0430/0269/1743/files/38296292472.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_off0000beac.bin
c51147a9aafc1bca3526ba1603ce3b9e11c924995c0743162800706f863dad08		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBEAC 5432 bytes
font_01_sfnt_off0000d10e.bin
e31eded419ea69a1e7e07f096f5cc53f60b83d01e114df92277d91bb931d6642		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD10E 10704 bytes

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