Malicious PDF — malware analysis report

Static analysis result for SHA-256 028fc0ae269618b9…

MALICIOUS

PDF

40.6 KB Created: 2020-08-14 01:28:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 33859f49cb1a11f2db3c92bb40c77309 SHA-1: 45e962e1f77041730f0d869b09d12e5940350e28 SHA-256: 028fc0ae269618b92431177eb07fa91ee9ad7fc32856a932b4454eda01875507
154 Risk Score

Malware Insights

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

The PDF contains a high number of embedded links, many of which point to a link farm hosted on Shopify, and one critical link redirects to known malicious infrastructure. The document body, though heavily obfuscated, contains the URL that leads to the malicious redirector. This suggests the primary goal is to redirect the user 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.cc/pify?keyword=jio+calling++apps
    • http://files.naturalsoaplady.ca/uploads/1/3/2/7/132740764/fce43300e.pdf
    • http://namibu.nataliekfitness.com/uploads/1/3/0/8/130814328/wavigibelezu.pdf
    • http://files.bearcreekanimalclinic.com/uploads/1/3/1/3/131380345/gudetelejisev.pdf
    • http://files.healthafter40.blog/uploads/1/3/0/8/130874612/085f2002f82aa5.pdf
    • http://files.glynnabaker.com/uploads/1/3/0/8/130813778/wazigelowefu.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/0778/6654/files/serebenabelemonoduxubero.pdf
    • https://cdn.shopify.com/s/files/1/0433/1080/9256/files/bevumupabojo.pdf
    • https://cdn.shopify.com/s/files/1/0429/6779/3817/files/61314031808.pdf
    • https://cdn.shopify.com/s/files/1/0435/8701/0715/files/dezofurorunivapesevu.pdf
    • https://cdn.shopify.com/s/files/1/0432/8911/6840/files/56176237439.pdf
    • https://cdn.shopify.com/s/files/1/0432/4127/5547/files/46226520585.pdf
    • https://cdn.shopify.com/s/files/1/0430/5505/5002/files/kewuwokedafodakufokekuki.pdf
    • https://cdn.shopify.com/s/files/1/0440/6162/2437/files/dadezederamokisofepiruxom.pdf
    • https://cdn.shopify.com/s/files/1/0443/6888/7964/files/cancellation_of_debt_irs_form_1099-_c.pdf
    • https://cdn.shopify.com/s/files/1/0435/2396/5079/files/79524318793.pdf
    • https://cdn.shopify.com/s/files/1/0431/7852/4838/files/luzijise.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_off00006272.bin
79ade5dcfe6609878be636fe1b58e04e067d95d766e4804a2cb6261fae2127d1
pdf-font-stream PDF embedded font (sfnt) at offset 0x6272 4996 bytes
font_01_sfnt_off00007383.bin
d162668d2511aa21f27ca9647e5f91d0ae89fae36253dd744741dfd4296de417
pdf-font-stream PDF embedded font (sfnt) at offset 0x7383 10060 bytes