Malicious PDF — malware analysis report

Static analysis result for SHA-256 953b15fdb78592d0…

MALICIOUS

PDF

47.9 KB Created: 2020-08-24 07:08:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f5e8134d35be626247c0650a04f949df SHA-1: 84908d0003c3f1dc3f9ec231a0ad0747c0414e44 SHA-256: 953b15fdb78592d03c291f9cf7a07b0e8d70a2147367183682d8bc7e601171b8
152 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many pointing to Shopify domains, but one critical link directs to a known malicious redirector. The document body, though heavily obfuscated, contains text related to 'Christmas poster psd template free' and the malicious URL, suggesting a lure to a phishing or malware distribution site. The ML classifier strongly flagged this PDF as malicious.

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.ru/pify?keyword=christmas+poster+psd+template+free
    • http://files.peterscreekautomotive.com/uploads/1/3/2/8/132814241/zozovodop.pdf
    • http://duzorezew.nationalhorselovers.com/uploads/1/3/1/4/131406665/rofedud.pdf
    • http://files.lyndhurstearlyyears.co.uk/uploads/1/3/1/6/131637362/dutizexutux.pdf
    • http://files.samanthacotterill.com/uploads/1/3/1/8/131871621/5192610.pdf
    • https://cdn.shopify.com/s/files/1/0428/8181/0595/files/161080019.pdf
    • https://cdn.shopify.com/s/files/1/0434/0816/2981/files/rujozejive.pdf
    • https://cdn.shopify.com/s/files/1/0431/5322/7932/files/adobe_acrobat_pdf_editor_download_for_pc.pdf
    • https://cdn.shopify.com/s/files/1/0433/5943/6951/files/nizabuparapus.pdf
    • https://cdn.shopify.com/s/files/1/0431/2399/8874/files/microeconomics_principles_and_applications_6th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0438/3113/2322/files/watch_bleach_online.pdf
    • https://cdn.shopify.com/s/files/1/0439/0053/4952/files/82310110040.pdf
    • https://cdn.shopify.com/s/files/1/0434/7461/6472/files/69311304299.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/lezoxaxus.pdf
    • https://cdn.shopify.com/s/files/1/0440/9557/0072/files/54978801369.pdf
    • https://cdn.shopify.com/s/files/1/0434/3873/5512/files/fipoguxofodumonuwirasu.pdf
    • https://cdn.shopify.com/s/files/1/0464/8747/0248/files/blank_flow_chart_template_for_powerpoint.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000777c.bin
f3c1f545ebd449b2fe1a2f091059e1f5c7c5b53e2fee6698b964dd94f8bb3a3d
pdf-font-stream PDF embedded font (sfnt) at offset 0x777C 5188 bytes
font_01_sfnt_off000088f7.bin
73096464a5a8ab6b46fbd3d2b260c3c1785909deadb3d5af7171e4e80cff458b
pdf-font-stream PDF embedded font (sfnt) at offset 0x88F7 13492 bytes