Malicious PDF — malware analysis report

Static analysis result for SHA-256 8129e886e2d6c909…

MALICIOUS

PDF

53.4 KB Created: 2020-09-08 01:55:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c0a82a88665bcbd3def030afc7370a25 SHA-1: 11ba517d6dcc4a08e87188a46ef31b169db5d194 SHA-256: 8129e886e2d6c9098360e3ba98baee8123db0a8c28e18e08f34dde62456d61d0
154 Risk Score

Malware Insights

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

This PDF document contains a link that redirects to a known malicious domain, identified by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body and embedded link structure suggest a lure to disguise the malicious redirection as legitimate content. The ML classifier also strongly indicated maliciousness.

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.club/wix?keyword=ikea+kallax+shelf+instructions+pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0437/5917/3790/files/vertebrate_zoology_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0440/5588/8022/files/52488656972.pdf
    • https://cdn.shopify.com/s/files/1/0430/0200/3615/files/metal_gear_solid_gamecube.pdf
    • https://static.usrfiles.com/ugd/b8c837_70397251cb4b4e688b91709fcbc6f7f5.pdf
    • https://static.usrfiles.com/ugd/b8c837_1704dd35a41148099ccebb10aa52a13f.pdf
    • https://static.usrfiles.com/ugd/e3834b_9f9eeafbac5b42d6b4aef14e0cd9b14a.pdf
    • https://static.usrfiles.com/ugd/50de67_8f5a76cdc1044ff58ed3faef5f432e7e.pdf
    • https://static.usrfiles.com/ugd/b0c717_0d4e5a59d4b94545922735d1190d9917.pdf
    • https://cdn.shopify.com/s/files/1/0431/6397/5835/files/44554728747.pdf
    • https://cdn.shopify.com/s/files/1/0427/8275/2935/files/xalorumerejasegup.pdf
    • https://cdn.shopify.com/s/files/1/0428/1643/8438/files/74182396874.pdf
    • https://cdn.shopify.com/s/files/1/0437/4167/5685/files/cya_soccer_travel_uniforms.pdf
    • https://cdn.shopify.com/s/files/1/0428/3321/5644/files/improve_your_handwriting_practice_sheets.pdf
    • https://static.usrfiles.com/ugd/19ce5d_0a761deb29f340e8a14e52d6e15ddbe5.pdf
    • https://static.usrfiles.com/ugd/d775a9_b49326147c1e45e0adf711fbd91aa099.pdf
    • https://static.usrfiles.com/ugd/b8c837_301c48002ee94410999423f0df408d60.pdf
    • https://static.usrfiles.com/ugd/0adedf_affb3a91f55b4878a3c6216b41360dcd.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007b74.bin
40b91cfaad5e4faeca8a0e646dab167f8325b49d27fb215e63b3fba1bfb24108		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7B74 5196 bytes
font_01_sfnt_off00008d03.bin
fea8ec43a43eccf77de2a274ac529e5c87bab4e2381b2510f9b19915b04c2be3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8D03 13776 bytes
font_02_sfnt_off0000b828.bin
1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB828 4324 bytes

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