Malicious PDF — malware analysis report

Static analysis result for SHA-256 62b7705a6823000f…

MALICIOUS

PDF

42.2 KB Created: 2020-08-04 01:00:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: dd1538a98fae5128bcbb43899fdbefd2 SHA-1: 61f40428a83d459b8bae4cab4e6cf704a83818cf SHA-256: 62b7705a6823000f37c06c4bff2b01709dfe42fef899b56aeab23df22b22856a
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file contains numerous embedded links, many of which point to a link farm designed to manipulate search engine results. One prominent URL, https://ttraff.ru/pify?keyword=backward+design+template+pdf, is identified as a malicious redirector. The document body, though heavily obfuscated, contains text suggesting it is a 'backward design template pdf', likely a lure to encourage users to click the malicious links. No scripts were extracted, but the presence of a malicious redirector and a large number of external links indicates an attempt to lead users to harmful content.

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=backward+design+template+pdf
    • http://files.apostrophe1.com.au/uploads/1/3/0/7/130775229/jadegafezafujad_zofiritukipeza_mevosata_vevewinob.pdf
    • http://files.divinedishcatering.com/uploads/1/3/2/6/132681992/vasefojim-zilojaj-nunifuzi-davuzaxaxagat.pdf
    • http://files.artistiquedanceacademy.com/uploads/1/3/2/6/132681460/nasogize.pdf
    • http://files.austinpcoscare.com/uploads/1/3/2/6/132681028/8719731.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/7392/9377/files/latazilovoge.pdf
    • https://cdn.shopify.com/s/files/1/0432/2941/3544/files/nuzele.pdf
    • https://cdn.shopify.com/s/files/1/0435/5037/6100/files/42148451612.pdf
    • https://cdn.shopify.com/s/files/1/0433/3607/3366/files/48541911860.pdf
    • https://cdn.shopify.com/s/files/1/0438/2176/0672/files/vizexafa.pdf
    • https://cdn.shopify.com/s/files/1/0428/1538/9855/files/tizurojilejazojakujezema.pdf
    • https://cdn.shopify.com/s/files/1/0430/4125/9671/files/24448690825.pdf
    • https://cdn.shopify.com/s/files/1/0432/8659/3694/files/who_geoff_smart.pdf
    • https://cdn.shopify.com/s/files/1/0430/2936/4889/files/zurizoxozowoxigutelidakax.pdf
    • https://cdn.shopify.com/s/files/1/0429/8709/4177/files/vuliba.pdf
    • https://cdn.shopify.com/s/files/1/0429/9613/8137/files/87284611456.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_off00006557.bin
52185299f48b042f394b2b4b19684078a6bbb7bcf77b9ada9a7327d0039f603d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6557 5680 bytes
font_01_sfnt_off000078af.bin
ddceea9506fb00df08222430e90f43ed31b0be483eeaea586f4989e29aaadbd9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x78AF 10532 bytes

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