Malicious PDF — malware analysis report

Static analysis result for SHA-256 770d4722b1e6dbd6…

MALICIOUS

PDF

63.8 KB Created: 2020-08-03 01:04:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 12a383ba701256c614dada24aa367d31 SHA-1: f5b66b302f7c7c6e1c90e6e70ecae534073e29a8 SHA-256: 770d4722b1e6dbd6ef82e15cebad309ec50085964b0a1c527ea85023a99b8f3a
154 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with one identified as a known malicious redirector. The document body, though heavily obfuscated, contains the URL 'https://ttraff.com/pify?keyword=is+crack+cheaper+than+coke', which is also flagged as a malicious redirector. The presence of numerous external links, many pointing to Shopify domains hosting other PDFs, suggests a link farm or redirection scheme designed to obscure the final malicious destination.

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=is+crack+cheaper+than+coke
    • http://vuluvar.simixlaundrydetergent.com/uploads/1/3/1/8/131856185/508c19a0f.pdf
    • http://vipit.onlinepianostudy.com/uploads/1/3/1/0/131070767/paxagi-mijovube-fatop.pdf
    • http://files.pdjensenartist.com/uploads/1/3/0/8/130814935/wogitekor-lefibawifa.pdf
    • http://files.execspringboard.com/uploads/1/3/0/7/130739415/pozugitogi-nufese-fuporulazorux.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0440/5110/3894/files/mortal_kombat_moves.pdf
    • https://cdn.shopify.com/s/files/1/0428/4828/8935/files/kitigewazixidi.pdf
    • https://cdn.shopify.com/s/files/1/0432/8102/3140/files/62396611923.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/lorabo.pdf
    • https://cdn.shopify.com/s/files/1/0427/8406/3654/files/37960832898.pdf
    • https://cdn.shopify.com/s/files/1/0430/0016/8597/files/pabemosifalezeje.pdf
    • https://cdn.shopify.com/s/files/1/0434/0006/9283/files/76493005941.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/xibirinadinabamagumib.pdf
    • https://cdn.shopify.com/s/files/1/0431/8344/0030/files/jazivazo.pdf
    • https://cdn.shopify.com/s/files/1/0432/3901/4562/files/kuwufurefamodomifemur.pdf
    • https://cdn.shopify.com/s/files/1/0429/9633/4753/files/csr_racing_mod_apk.pdf
    • https://cdn.shopify.com/s/files/1/0428/7388/0739/files/paxejujupaso.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_off0000bb90.bin
0e3a95b624054b1d735e1a8570a9600224068ee9169f7db870020356380de8b9		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBB90 4988 bytes
font_01_sfnt_off0000cc87.bin
b3b7a41ed968f46f874be10164b8b869a7a3d7ed1f474cc22bc83c5fc2eba8d6		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCC87 11040 bytes

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