Malicious PDF — malware analysis report

Static analysis result for SHA-256 b46682870b846f42…

MALICIOUS

PDF

43.6 KB Created: 2020-08-06 19:01:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f96349842337a6f68e323f7be27dfc33 SHA-1: 74077d3ac22e8804112bd1a75d01c7d255736282 SHA-256: b46682870b846f42e563046408055a09eb78251c40de0687f9f5ff9508cfbd47
152 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, many pointing to Shopify domains hosting other PDFs, suggesting a link farm or SEO poisoning tactic. One critical heuristic identified a link to a known malicious redirector at 'https://ttraff.com/pify?keyword=sum+of+arithmetic+sequence+worksheet+pdf'. The document body, though heavily obfuscated, also contains this URL, indicating the primary intent is to redirect the user to malicious infrastructure. The ML classifier strongly supports the malicious nature of this PDF.

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=sum+of+arithmetic+sequence+worksheet+pdf
    • http://files.foxchapelareabands.com/uploads/1/3/0/8/130814238/1341174.pdf
    • http://files.hazardhealth.com/uploads/1/3/0/8/130874124/37c119.pdf
    • http://files.stacielong.com/uploads/1/3/1/4/131453124/nexevanunane-jisajibopo-zipip.pdf
    • http://files.wallstreetluxury.com/uploads/1/3/1/3/131380107/5bc06631a7e4a5f.pdf
    • http://files.morjimcocopalms.com/uploads/1/3/1/3/131384789/2a0aea98a146c0c.pdf
    • https://cdn.shopify.com/s/files/1/0431/3025/7568/files/zijadadozipuvilas.pdf
    • https://cdn.shopify.com/s/files/1/0435/6295/9006/files/lulelawitunelofebebuxe.pdf
    • https://cdn.shopify.com/s/files/1/0436/4235/5865/files/duzigape.pdf
    • https://cdn.shopify.com/s/files/1/0438/2654/4802/files/famonetubebinu.pdf
    • https://cdn.shopify.com/s/files/1/0431/3396/0341/files/mibolaxubejuxuwasam.pdf
    • https://cdn.shopify.com/s/files/1/0428/6365/7119/files/94939674549.pdf
    • https://cdn.shopify.com/s/files/1/0429/9682/6273/files/long_walk_to_freedom_the_autobiography_of_nelson_mandela.pdf
    • https://cdn.shopify.com/s/files/1/0432/7243/7910/files/pezuzirujidenomuduvar.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/61238086127.pdf
    • https://cdn.shopify.com/s/files/1/0433/0592/6809/files/95515535586.pdf
    • https://cdn.shopify.com/s/files/1/0436/9825/8088/files/runir_2_fichiers_en_un_seul.pdf
    • https://cdn.shopify.com/s/files/1/0431/4333/2000/files/gusavakukugutevukifukige.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_off00006772.bin
4b7eaeb794d069dd90286663b9e84f476b0b88ce950b896b5426ad6ec919583f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6772 5748 bytes
font_01_sfnt_off00007af0.bin
04144e818ec301a487aaae2e92d8a79a3262c21335f1d09a3417ad992835139d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7AF0 11292 bytes

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