Malicious PDF — malware analysis report

Static analysis result for SHA-256 86d0248e312ed6b2…

MALICIOUS

PDF

40.0 KB Created: 2020-08-05 14:10:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2f3fc613c49799f6219b33478f8302e1 SHA-1: 34cc672beb7fb73dd9ff7214c8e505a8eee57bcd SHA-256: 86d0248e312ed6b25e16d959353b81e6480afedd922cb4759ba31c23294d55b0
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 pointing to benign Shopify URLs, but one critical link directs to a known malicious redirector. The document body, though corrupted, contains text related to driving and the malicious URL, suggesting a lure to a phishing or scam page. The ML classifier strongly flagged this PDF as malicious, indicating a high likelihood of malicious intent.

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/wb?keyword=cara%20mengendarai%20mobil%20manual%20bagi%20pemula
    • http://files.robertosmathnotes.com/uploads/1/3/1/6/131606583/c545eb732f69e86.pdf
    • http://files.learningforlittlepeoplepreschool.com/uploads/1/3/1/4/131438456/57ea1e3d3c.pdf
    • http://files.sandaharrboerboels.com/uploads/1/3/2/6/132681566/6896535.pdf
    • http://files.reinbowridingcenter.org/uploads/1/3/1/4/131482968/204428.pdf
    • http://files.villamangocr.com/uploads/1/3/2/6/132682471/6437c2bdde2f810.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0438/0357/4434/files/scarecrow_coloring_page.pdf
    • https://cdn.shopify.com/s/files/1/0434/5721/6678/files/13143652902.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/puliwaxaj.pdf
    • https://cdn.shopify.com/s/files/1/0428/3590/2631/files/75518282548.pdf
    • https://cdn.shopify.com/s/files/1/0428/8118/8003/files/88760414597.pdf
    • https://cdn.shopify.com/s/files/1/0430/1216/1685/files/30545318817.pdf
    • https://cdn.shopify.com/s/files/1/0440/3150/8645/files/67035548250.pdf
    • https://cdn.shopify.com/s/files/1/0437/2486/5685/files/xedadu.pdf
    • https://cdn.shopify.com/s/files/1/0433/6100/9829/files/68605663422.pdf
    • https://cdn.shopify.com/s/files/1/0435/4818/0634/files/certificat_cession_voiture.pdf
    • https://cdn.shopify.com/s/files/1/0439/9097/4622/files/custom_ipsw_download.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_off0000601d.bin
ad97faa3ff02aa519836d7bd7ecfc34250029bcc5b459b4aa82d8d8e4426501c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x601D 5144 bytes
font_01_sfnt_off0000717b.bin
27b468bdf9bf7e3a978aecdaf6f28ec8173e85df011302247fbfde00edcc23a5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x717B 9732 bytes

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