Malicious PDF — malware analysis report

Static analysis result for SHA-256 186c4ac18f876df5…

MALICIOUS

PDF

73.1 KB Created: 2020-08-04 03:03:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e162485654af525857d656bcf0b6b006 SHA-1: be696fa7bc165427da70a7e1595b7ba747c7c565 SHA-256: 186c4ac18f876df509e1d272369f385a50523b3329cce803d589ee11c0abd219
154 Risk Score

Malware Insights

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

The PDF document contains numerous links, masquerading as a legitimate resource on family coping strategies, but directs users to malicious redirector infrastructure. The primary malicious URL identified is https://ttraff.com/pify?keyword=estrategias+de+afrontamiento+familiar+pdf, which is flagged as a malicious redirector. The document's structure and the high number of outbound links suggest a link farm or SEO manipulation tactic to distribute malicious 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.com/pify?keyword=estrategias+de+afrontamiento+familiar+pdf
    • http://files.silverspoondinner.com/uploads/1/3/1/8/131871705/d9be8b6f97.pdf
    • http://files.kanadhospitalphysiotherapy.org/uploads/1/3/1/6/131606494/e52d91dd.pdf
    • http://files.smartintegratedsolutions.co.uk/uploads/1/3/0/7/130739076/7625ea745.pdf
    • http://gijux.outfitterdesign.com/uploads/1/3/1/4/131437604/jafifevu.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/4842/6902/files/jatosegotis.pdf
    • https://cdn.shopify.com/s/files/1/0433/4046/4281/files/55083005252.pdf
    • https://cdn.shopify.com/s/files/1/0433/3505/7559/files/40765261694.pdf
    • https://cdn.shopify.com/s/files/1/0431/9979/1265/files/doxutibujavajededunekal.pdf
    • https://cdn.shopify.com/s/files/1/0432/7315/8821/files/30379809453.pdf
    • https://cdn.shopify.com/s/files/1/0427/7754/2823/files/pebupifep.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/15843942414.pdf
    • https://cdn.shopify.com/s/files/1/0431/7410/1160/files/xojinaxo.pdf
    • https://cdn.shopify.com/s/files/1/0430/2965/9805/files/52235783050.pdf
    • https://cdn.shopify.com/s/files/1/0430/6462/3265/files/lafud.pdf
    • https://cdn.shopify.com/s/files/1/0440/0755/5222/files/63699301465.pdf
    • https://cdn.shopify.com/s/files/1/0430/3575/4650/files/96191683185.pdf
    • https://cdn.shopify.com/s/files/1/0430/8860/9429/files/63551296777.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_off0000df40.bin
133028d27aaf163f46330b1f35b20ec969d2df04d09cfb6bb34c5136dc66c90f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDF40 5316 bytes
font_01_sfnt_off0000f146.bin
d6423d112a85aa105ddfcce60e6b0d5ad71d5b6a23b51e825c876d2bbfa4a626		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF146 11552 bytes

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