Malicious PDF — malware analysis report

Static analysis result for SHA-256 2fd174ddfd294a5f…

MALICIOUS

PDF

44.2 KB Created: 2020-08-03 14:40:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d80e6f7f25d7c8870ab0d63515f0a3db SHA-1: 01c7dbf30da99760f67b34148c2f586e65aa7f86 SHA-256: 2fd174ddfd294a5f3bcbb6d5f7aebd060e0e4710e75c84921fb5f058ca8ea47a
152 Risk Score

Malware Insights

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

This PDF file contains a large number of embedded links, many pointing to Shopify domains, which is characteristic of a link farm designed to manipulate search engine results. One critical heuristic identified a link to a known malicious redirector at 'https://ttraff.com/pify?keyword=curso+arquitectura+de+computadoras+pdf'. The document body, though heavily obfuscated, contains this same URL, suggesting the primary purpose 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.com/pify?keyword=curso+arquitectura+de+computadoras+pdf
    • http://files.cityofdanville.org/uploads/1/3/1/4/131409200/nagasejomimizan.pdf
    • http://files.adaughterscareassistedliving.com/uploads/1/3/0/7/130775436/7832289.pdf
    • http://files.stampsforthought.com/uploads/1/3/0/7/130738681/0d7a856.pdf
    • http://files.bendareatours.com/uploads/1/3/1/4/131453818/koguwazapen.pdf
    • http://files.rkgourdcreations.com/uploads/1/3/2/3/132302916/pewim-moxuxaforaripu-ridaxo-xafunotadisofef.pdf
    • https://cdn.shopify.com/s/files/1/0428/8151/5673/files/nasoviporegimopidolibef.pdf
    • https://cdn.shopify.com/s/files/1/0434/2962/6017/files/xusonirofozogulu.pdf
    • https://cdn.shopify.com/s/files/1/0428/9468/8412/files/reaper_vs_pro_tools.pdf
    • https://cdn.shopify.com/s/files/1/0430/0950/7487/files/wevazinibeguzar.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/zemeletitofugawekabol.pdf
    • https://cdn.shopify.com/s/files/1/0430/9119/8112/files/chemical_equilibrium_class_11_notes_download.pdf
    • https://cdn.shopify.com/s/files/1/0429/4947/6518/files/dodufujo.pdf
    • https://cdn.shopify.com/s/files/1/0428/2161/5775/files/83471053316.pdf
    • https://cdn.shopify.com/s/files/1/0431/9795/6256/files/zijum.pdf
    • https://cdn.shopify.com/s/files/1/0432/1335/7214/files/diniwuworisakumox.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005d7a.bin
ead68afd755c2e7eb6fce80e7bd7815fdb8779fd715f34586ad3994315e6f48f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5D7A 5192 bytes
font_01_sfnt_off00006f2f.bin
304a1df8a67f8f079ee622344a063b50bed1a76300e613ab48a105ef4a011c92		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6F2F 11292 bytes
font_02_sfnt_off00009404.bin
d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9404 4324 bytes

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