Malicious PDF — malware analysis report

Static analysis result for SHA-256 0a198fd3f386b6f3…

MALICIOUS

PDF

41.5 KB Created: 2020-07-12 21:33:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 71178d2a98c6edb6c293690a1f917195 SHA-1: d00245bd1a57a83244ea899882d130f61363c2bc SHA-256: 0a198fd3f386b6f32218055e877a4ef87746df52b17d61049672edc176097560
154 Risk Score

Malware Insights

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

The PDF contains a significant number of embedded links, identified as a link farm, pointing to external resources. One prominent URL, 'https://ttraff.ru/pify?keyword=adobe+cs5+master+collection+torrent', is flagged as a malicious redirector. The ML classifier also strongly indicated maliciousness. The document body, though heavily obfuscated, appears to contain keywords related to software torrents, suggesting a lure for potentially pirated software.

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/pify?keyword=adobe+cs5+master+collection+torrent
    • http://files.wagnersmarket.com/uploads/1/3/0/8/130873771/lajegumuxi.pdf
    • http://files.generaldrilling.com/uploads/1/3/1/4/131437091/60367126750025f.pdf
    • http://files.guesthouseouassaggou.com/uploads/1/3/1/4/131438509/8192980.pdf
    • http://files.scarlethistoricalreview.org/uploads/1/3/1/6/131637163/1087964.pdf
    • http://files.swornoathbrand.com/uploads/1/3/1/4/131406068/kupaxugefesupisulira.pdf
    • http://files.tallsprucefarm.com/uploads/1/3/2/8/132815008/rapatexod-dobidopoxiwave.pdf
    • http://files.artandhappiness.shop/uploads/1/3/1/3/131383305/359844.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://gasoxof.files.wordpress.com/2020/06/fovaxamorilalewidedu.pdf
    • https://mawumobu.files.wordpress.com/2020/07/65267435429.pdf
    • https://badupegenum.files.wordpress.com/2020/07/80192051720.pdf
    • https://lorirosoxaxe.files.wordpress.com/2020/06/36867345264.pdf
    • https://cdn.shopify.com/s/files/1/0432/6916/1110/files/67002292785.pdf
    • https://cdn.shopify.com/s/files/1/0429/5085/2762/files/bexukatinazolomokolam.pdf
    • https://cdn.shopify.com/s/files/1/0430/0275/7281/files/27299864115.pdf
    • https://cdn.shopify.com/s/files/1/0431/2226/2178/files/87245451029.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/dadimutixiwukigojubiw.pdf
    • https://cdn.shopify.com/s/files/1/0432/0441/1556/files/28064586778.pdf
    • https://cdn.shopify.com/s/files/1/0431/5326/0706/files/wepadabevis.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/9467339244.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/12509012650.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_off000063b8.bin
3576d470882c038afb37648f3e155bc51b1cac7a6b520512dfe581f9dd145daa		 pdf-font-stream PDF embedded font (sfnt) at offset 0x63B8 5124 bytes
font_01_sfnt_off000074fc.bin
20d5f9b6b472ae1ff6295308db7aef736f21a5efdb02374f7a67f7ba3ca8c847		 pdf-font-stream PDF embedded font (sfnt) at offset 0x74FC 10284 bytes

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