Malicious PDF — malware analysis report

Static analysis result for SHA-256 127ab6159effd28a…

MALICIOUS

PDF

41.7 KB Created: 2020-08-29 18:39:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: afd191b075cf50867417ce0096f9dd66 SHA-1: 3413418cac76600f26f73360f4d3192b9ccc587b SHA-256: 127ab6159effd28a5e3048279a97b441b817a391dad3cf6d6f47f96168d67668
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 Shopify-hosted PDFs, which is indicative of a link farm. One critical heuristic identified a link to a known malicious redirector, ttraff.me, which likely serves as the initial lure. 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.me/wix?keyword=casio+baby+g+model+5001+manual
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0438/9902/7611/files/varemetixopolali.pdf
    • https://cdn.shopify.com/s/files/1/0438/3644/0726/files/daxiwelo.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/41448402009.pdf
    • https://cdn.shopify.com/s/files/1/0461/4881/2963/files/public_relations_officer_duties.pdf
    • https://static.usrfiles.com/ugd/0779a3_7742d411386946739a8534cad8d8bb45.pdf
    • https://static.usrfiles.com/ugd/b98abb_a3e2a659860246198f80292f5d0526ba.pdf
    • https://static.usrfiles.com/ugd/b77b08_e495d373d9504d62a0eb12a10bfd8862.pdf
    • https://static.usrfiles.com/ugd/b7082a_e12e46c27be6462bafa5a70c86462081.pdf
    • https://cdn.shopify.com/s/files/1/0435/5876/4696/files/40660654376.pdf
    • https://cdn.shopify.com/s/files/1/0432/5621/7750/files/savesajuva.pdf
    • https://cdn.shopify.com/s/files/1/0433/9502/3013/files/pathogenic_microorganisms.pdf
    • https://cdn.shopify.com/s/files/1/0427/9602/3975/files/best_formal_dress_shops_perth.pdf
    • https://cdn.shopify.com/s/files/1/0432/0791/7729/files/gypsy_jazz_guitar_arpeggios.pdf
    • https://static.usrfiles.com/ugd/b8c837_e3afc6601c9d44ddaa07efbd1157a941.pdf
    • https://static.usrfiles.com/ugd/b8c837_69b7f69f54454e3f9f877e93227c4a94.pdf
    • https://static.usrfiles.com/ugd/b8c837_649517d3e2b14ba1816d4229783b3e13.pdf
    • https://static.usrfiles.com/ugd/6908d7_7c7b3c3181aa4bf08e60947ddf88b8f9.pdf
    • https://static.usrfiles.com/ugd/b8c837_a182443aa60d49d9aceba2fbf9fcfffd.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_off00006514.bin
ed7063fb2fd7781a4d479a1551701dfe83dd707f9798ba2434604a699592eb56		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6514 5516 bytes
font_01_sfnt_off000077d0.bin
2aba232dbf2e6cc727cdbe3bd3a4666a91c9186773fed351256060153cb8a2bf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x77D0 9828 bytes

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