Malicious PDF — malware analysis report

Static analysis result for SHA-256 b19a79cf0a816c94…

MALICIOUS

PDF

48.3 KB Created: 2020-08-25 00:48:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1f4bb6cef4c62ac6c8d9645cdaaa9b45 SHA-1: e778f034d512cd279b834e3dada4f0b58bd45d72 SHA-256: b19a79cf0a816c947f830c853b9b68d165b414da195a7cb7fc7648b05a82a85b
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a large number of embedded links, many of which point to external PDF files hosted on Shopify. One of these links, 'https://ttraff.com/pify?keyword=analytical+balance+lab+report', is identified as a known malicious redirector. The presence of a link farm and a malicious redirector 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.com/pify?keyword=analytical+balance+lab+report
    • http://xabosipe.avakonohiki.org/uploads/1/3/1/4/131452958/2d80191.pdf
    • http://fixedu.columbusfoodtroll.com/uploads/1/3/2/6/132681670/sijifujupefil-larevi.pdf
    • http://files.claireallegrataylor.net/uploads/1/3/1/4/131438293/mabata_nedurazixelenu.pdf
    • https://cdn.shopify.com/s/files/1/0435/9074/6271/files/mise_a_jour_android_10_samsung_a50.pdf
    • https://cdn.shopify.com/s/files/1/0435/1236/5211/files/posatipaveliku.pdf
    • https://cdn.shopify.com/s/files/1/0433/1044/8798/files/44730783586.pdf
    • https://cdn.shopify.com/s/files/1/0457/7371/7670/files/hudson_and_rex_season_2_episode_guide.pdf
    • https://cdn.shopify.com/s/files/1/0430/4394/6649/files/kalefufigeb.pdf
    • https://cdn.shopify.com/s/files/1/0432/7600/9622/files/zuvokijag.pdf
    • https://cdn.shopify.com/s/files/1/0435/3087/9125/files/xosadejenukogi.pdf
    • https://cdn.shopify.com/s/files/1/0437/9272/8226/files/addition_and_subtraction_worksheets_for_class_2.pdf
    • https://cdn.shopify.com/s/files/1/0434/7474/7558/files/calculus_early_transcendentals_8th_edition_solutions.pdf
    • https://cdn.shopify.com/s/files/1/0435/8445/4811/files/73444090875.pdf
    • https://cdn.shopify.com/s/files/1/0430/0403/5221/files/22474722479.pdf
    • https://cdn.shopify.com/s/files/1/0430/6924/3549/files/93461584596.pdf
    • https://cdn.shopify.com/s/files/1/0454/7294/0198/files/89406275297.pdf
    • https://cdn.shopify.com/s/files/1/0437/8856/6677/files/86560224617.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_off0000810e.bin
524ab5615427a1f9ba2cb5de3d073ca3975903dfa169f3f19df7cc2fbcebeadc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x810E 4980 bytes
font_01_sfnt_off00009204.bin
40be3fbd6f9b7ca933d4986f7a6861c78c5cf82f826a4fb8e66d459832c4f7b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9204 10020 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.