Malicious PDF — malware analysis report

Static analysis result for SHA-256 999cda4da2a5e40b…

MALICIOUS

PDF

44.4 KB Created: 2020-08-20 06:30:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 128d358605bee41ac85075b68f624b1b SHA-1: fd4d49952f8b443c49d7a26ab84735d7f02d1cc0 SHA-256: 999cda4da2a5e40bad5e2c1fdfb4c7d3ad7c422da8fff9fbf45351e3cd99cbd2
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains embedded links that redirect to a known malicious domain, ttraff.com, which is likely part of a phishing or malware distribution scheme. The document body, though heavily obfuscated, contains text referencing "jolly phonics teacher book pdf" and the malicious URL, suggesting a lure to trick users into clicking the link. The presence of numerous other PDF links, many hosted on Shopify, indicates a potential link farm or SEO poisoning tactic to increase visibility. No scripts were extracted, but the critical heuristic firings strongly indicate malicious redirection.

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=jolly+phonics+teacher+book+pdf
    • http://vevufe.autumnlealshopp.com/uploads/1/3/1/4/131407995/2514336.pdf
    • http://files.thespotheadshop.com/uploads/1/3/1/3/131379361/2c5ca.pdf
    • https://cdn.shopify.com/s/files/1/0437/3633/4501/files/nenopikokibapikagor.pdf
    • https://cdn.shopify.com/s/files/1/0427/6604/1244/files/11791271137.pdf
    • https://cdn.shopify.com/s/files/1/0434/0023/3112/files/51182294734.pdf
    • https://cdn.shopify.com/s/files/1/0433/1274/2550/files/15014942325.pdf
    • https://cdn.shopify.com/s/files/1/0433/5098/2821/files/53014780287.pdf
    • https://cdn.shopify.com/s/files/1/0430/7812/3669/files/negonekakiwexufixemam.pdf
    • https://cdn.shopify.com/s/files/1/0434/8307/0629/files/39616225522.pdf
    • https://cdn.shopify.com/s/files/1/0438/4541/9165/files/congenital_neurological_disorders.pdf
    • https://cdn.shopify.com/s/files/1/0432/5395/6758/files/understanding_stock_market_for_dummies.pdf
    • https://cdn.shopify.com/s/files/1/0438/3732/5472/files/powerpyx_until_dawn_trophy_guide.pdf
    • https://cdn.shopify.com/s/files/1/0431/6332/0469/files/tidunat.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000060bc.bin
e6cf2ba0d5356934345bbda6fa8985024e77f5b032b36120435344b373bc7f5e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x60BC 5328 bytes
font_01_sfnt_off000072c2.bin
d2599eefeedf0c3ecb9dd4d076496411d220c464f0d669f213647393c1eaaf50		 pdf-font-stream PDF embedded font (sfnt) at offset 0x72C2 10492 bytes
font_02_sfnt_off000096b8.bin
4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x96B8 4324 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.