Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e83ccfd3e47dfe0…

MALICIOUS

PDF

40.8 KB Created: 2020-08-22 18:45:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 24b5de3f2605a0a418c4a999477bb53b SHA-1: f4280d3dc69222b1bb71eb4eed4d81a501a9203e SHA-256: 0e83ccfd3e47dfe02021e2a1cbb3de48fd42eb267ed91db6b4e52fa818436d63
162 Risk Score

Malware Insights

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

The PDF contains a lure related to 'elder abuse mandatory reporting laws maryland' and embeds numerous links to external PDFs, many hosted on Shopify. One critical heuristic indicates the PDF links to known malicious redirector infrastructure. The ML classifier strongly flagged this PDF as malicious. While no scripts were extracted, the presence of multiple embedded URLs and the redirector link suggest an attempt to lead users to malicious content or for SEO manipulation.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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=elder+abuse+mandatory+reporting+laws+maryland
    • http://files.latin-numbers.com/uploads/1/3/1/0/131070051/03e5ed4.pdf
    • http://files.swords-dublin.com/uploads/1/3/0/7/130740141/tolozezeja.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/5199/8623/files/mowukovu.pdf
    • https://cdn.shopify.com/s/files/1/0430/8844/5604/files/visipabojozo.pdf
    • https://cdn.shopify.com/s/files/1/0431/1715/0368/files/39205632138.pdf
    • https://cdn.shopify.com/s/files/1/0433/1087/4777/files/jixagimofuduxujawa.pdf
    • https://cdn.shopify.com/s/files/1/0427/8868/3932/files/82121390309.pdf
    • https://cdn.shopify.com/s/files/1/0437/9970/7810/files/78424786005.pdf
    • https://cdn.shopify.com/s/files/1/0430/9359/0177/files/bible_stories_telugu.pdf
    • https://cdn.shopify.com/s/files/1/0436/6345/8457/files/bivasira.pdf
    • https://cdn.shopify.com/s/files/1/0435/1223/4139/files/anatomical_planes_and_directions.pdf
    • https://cdn.shopify.com/s/files/1/0433/7228/2008/files/aida64_extreme_key.pdf
    • https://cdn.shopify.com/s/files/1/0432/2017/2957/files/60881587032.pdf
    • https://cdn.shopify.com/s/files/1/0435/4198/7479/files/ripozukirepiwupomitegoki.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_off0000614a.bin
4f675c19bb558462758ae806a6409cb0870b957377c82a0c2bca84fd68245189		 pdf-font-stream PDF embedded font (sfnt) at offset 0x614A 5568 bytes
font_01_sfnt_off00007433.bin
7fe9659422cee8187f3514b40f7bfd6ad1087a7238a5b3a4be22e3be4cbe01c3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7433 10016 bytes

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