Malicious PDF — malware analysis report

Static analysis result for SHA-256 5b84a2047281a296…

MALICIOUS

PDF

42.5 KB Created: 2020-08-28 01:48:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b1f078323709c8d88ce225b87c6bd7f0 SHA-1: 5ba5a7d1f65379966171c55f8879f32056f3c3ad SHA-256: 5b84a2047281a2968755843b644068886054e08d7806805247698289ddbb0325
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a significant number of embedded links, with at least one pointing to known malicious redirector infrastructure (ttraff.com). The ML classifier also strongly indicated maliciousness. The document body itself is heavily obfuscated but contains references to the malicious URL and other benign-looking Shopify links, suggesting a link farm or redirection tactic.

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=pse+firestorm+lite+years
    • http://files.villageofstaplehurst.com/uploads/1/3/0/7/130775997/636746f02e.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/7921/2959/files/jiputekonaku.pdf
    • https://cdn.shopify.com/s/files/1/0432/6539/2804/files/mujafawajokofanebenujijo.pdf
    • https://cdn.shopify.com/s/files/1/0440/5932/8662/files/92334284347.pdf
    • https://cdn.shopify.com/s/files/1/0431/5666/8573/files/xoder.pdf
    • https://cdn.shopify.com/s/files/1/0440/5261/1222/files/self_actualization_theory.pdf
    • https://cdn.shopify.com/s/files/1/0432/8403/7792/files/dazovodawozasowutuniwow.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/29878061118.pdf
    • https://cdn.shopify.com/s/files/1/0431/6102/6719/files/kegorifa.pdf
    • https://cdn.shopify.com/s/files/1/0436/4979/4213/files/dowry_system_in_nepal.pdf
    • https://cdn.shopify.com/s/files/1/0429/1523/3948/files/72540138817.pdf
    • https://cdn.shopify.com/s/files/1/0441/3957/7496/files/siwebugizidiwalolim.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_off000067c0.bin
174dec96a3317ded68a79164f10e2b6f53e7e541da0cc517a7310a37bd90633c
pdf-font-stream PDF embedded font (sfnt) at offset 0x67C0 5016 bytes
font_01_sfnt_off000078b8.bin
8aac54dfbf9f1b5a1e79ed2139313d4cbe1cd85cf61d1964caea5272eecef742
pdf-font-stream PDF embedded font (sfnt) at offset 0x78B8 10728 bytes