Malicious PDF — malware analysis report

Static analysis result for SHA-256 69abe7c9d4672953…

MALICIOUS

PDF

44.8 KB Created: 2020-07-31 23:33:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6963a809cf56f44b944c97be3d2c9f26 SHA-1: 4cd24c3a0a2d68963abfed7c16c40f06b68db4b1 SHA-256: 69abe7c9d4672953bd15b36aef438c238300154fb0dac159232baf4c4f720ebe
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains a large number of embedded links, many of which point to Shopify domains hosting other PDFs, suggesting a link farm or SEO abuse. One prominent link, 'https://ttraff.ru/pify?keyword=herblore+calc+rs3', is identified as a malicious redirector. The document body, though heavily obfuscated, also contains this URL, indicating the primary intent is to redirect the user to malicious infrastructure. No scripts were extracted from this sample.

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.ru/pify?keyword=herblore+calc+rs3
    • http://files.thorsonpto.org/uploads/1/3/1/4/131453294/nujijifus-nedejisamo-vurupakezowavoj-xotiluf.pdf
    • http://files.uwfkappasigma.org/uploads/1/3/1/8/131858747/zawideburoku.pdf
    • http://files.saultblues.com/uploads/1/3/0/7/130775528/bawojaxefijisabaki.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/0878/5562/files/64273462411.pdf
    • https://cdn.shopify.com/s/files/1/0438/5511/8501/files/suzulexijizirasuditopawo.pdf
    • https://cdn.shopify.com/s/files/1/0431/1023/6321/files/kikiz.pdf
    • https://cdn.shopify.com/s/files/1/0434/5207/2088/files/muxegufolijos.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/66541571973.pdf
    • https://cdn.shopify.com/s/files/1/0432/7315/8821/files/82871626678.pdf
    • https://cdn.shopify.com/s/files/1/0431/7921/2959/files/kavobedo.pdf
    • https://cdn.shopify.com/s/files/1/0433/9751/3381/files/gajipidi.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/ganisififado.pdf
    • https://cdn.shopify.com/s/files/1/0435/8730/5629/files/jekexij.pdf
    • https://cdn.shopify.com/s/files/1/0430/5525/1605/files/4235585909.pdf
    • https://cdn.shopify.com/s/files/1/0429/2175/4787/files/sanuvewuni.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_off000062f8.bin
3fd16d6aeca1e08a9c7463503703d72c16e81cf3e28dd0038b598e6b8571e9ab
pdf-font-stream PDF embedded font (sfnt) at offset 0x62F8 5056 bytes
font_01_sfnt_off00007435.bin
4e3ebf335118ed24853ca30df2c2fd88963eff9e3269b38ef04acbd94326ddd3
pdf-font-stream PDF embedded font (sfnt) at offset 0x7435 15692 bytes