Malicious PDF — malware analysis report

Static analysis result for SHA-256 7da32061235da3bc…

MALICIOUS

PDF

54.8 KB Created: 2020-07-31 11:52:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 00105a229fefe38d998bcdb7dfbc8a65 SHA-1: 8fb24a7ecb0528482cbd425a22d6ea87532ebf75 SHA-256: 7da32061235da3bca1559c6e84638e1f6762fea2ef73ba0c90c8841c5016fae6
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to external PDF files, suggesting a link farm or SEO poisoning tactic. One critical heuristic identified a link to known malicious redirector infrastructure, indicating a potential phishing or malware distribution attempt. Although no scripts were extracted, the presence of numerous external links and the malicious redirector strongly suggest an intent to lead the user 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.cc/pify?keyword=bosquejos+de+sermones+textuales+cristianos+pdf
    • http://files.faithfitnesskzoo.com/uploads/1/3/1/1/131164358/12ab3fdda.pdf
    • http://files.is68jamaica.org/uploads/1/3/1/4/131438419/naxovujujiwemule.pdf
    • http://files.atatournament.com/uploads/1/3/2/6/132682833/a8a7169b81.pdf
    • http://files.laughingbuddharetreats.com/uploads/1/3/0/7/130739269/kosoxefixosakujelox.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0436/3078/8758/files/xopelivasudugobogezig.pdf
    • https://cdn.shopify.com/s/files/1/0430/6065/8330/files/mabukorupulimizolu.pdf
    • https://cdn.shopify.com/s/files/1/0431/6240/2967/files/20151520776.pdf
    • https://cdn.shopify.com/s/files/1/0432/1266/9089/files/kabiwuzaxejekuvazeg.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/kupenase.pdf
    • https://cdn.shopify.com/s/files/1/0430/1189/9551/files/zetisebilixowofud.pdf
    • https://cdn.shopify.com/s/files/1/0428/2191/0687/files/wodewukakekexak.pdf
    • https://cdn.shopify.com/s/files/1/0434/5479/1846/files/79829956000.pdf
    • https://cdn.shopify.com/s/files/1/0439/0898/9096/files/sijux.pdf
    • https://cdn.shopify.com/s/files/1/0435/4949/1359/files/gumejukopuramosovuga.pdf
    • https://cdn.shopify.com/s/files/1/0427/6623/7852/files/84852789522.pdf
    • https://cdn.shopify.com/s/files/1/0433/8037/5708/files/83231281410.pdf
    • https://cdn.shopify.com/s/files/1/0427/9762/9596/files/92112531282.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_off00009469.bin
90ab5af60d45e4a10e85fb2badba0caf25139cd53188eecdf41e6be17a29aee8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9469 5500 bytes
font_01_sfnt_off0000a708.bin
0ada3eb6d2af7d9da976ef72039dee255634794794ee739b9786bc3dd712c46c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA708 11464 bytes

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