Malicious PDF — malware analysis report

Static analysis result for SHA-256 17e9db04ee906dc9…

MALICIOUS

PDF

46.5 KB Created: 2020-08-01 22:44:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 118e7e80243aee9fc2a3fe9859d7fa6d SHA-1: a773028ce36b71abde4c7b929c5d0307885324e5 SHA-256: 17e9db04ee906dc932f13e600a96427bfe4695ab41bdf0c4f25de3f822f09a46
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 of which point to external PDF files hosted on various domains, suggesting a link farm or SEO poisoning attempt. One critical heuristic identified a link to known malicious redirector infrastructure at 'https://ttraff.cc/pify?keyword=liter+to+gallons', indicating a malicious intent to redirect users to harmful sites. While no scripts were extracted, the presence of numerous external links and the malicious redirector strongly suggests a phishing or redirection attack.

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.cc/pify?keyword=liter+to+gallons
    • http://files.taranakisummerschool.com/uploads/1/3/0/8/130874207/kamijagemepivo_kaximabe_zakiredepav.pdf
    • http://files.outlandscorgis.com/uploads/1/3/1/3/131379118/kavadetekofo.pdf
    • http://files.browbandessentials.com/uploads/1/3/1/3/131378953/b4d49b81.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0435/5214/5560/files/minecraft_team_extreme.pdf
    • https://cdn.shopify.com/s/files/1/0430/6662/2101/files/5837383138.pdf
    • https://cdn.shopify.com/s/files/1/0429/5802/8959/files/12306908273.pdf
    • https://cdn.shopify.com/s/files/1/0432/2571/0750/files/xofupekaloba.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/vufofabiziterefabul.pdf
    • https://cdn.shopify.com/s/files/1/0440/6607/8870/files/20536836708.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/51098187394.pdf
    • https://cdn.shopify.com/s/files/1/0432/0935/9520/files/44137613161.pdf
    • https://cdn.shopify.com/s/files/1/0429/5095/1066/files/84431927414.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/84574839703.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/29331550606.pdf
    • https://cdn.shopify.com/s/files/1/0430/8792/1313/files/54811886567.pdf
    • https://cdn.shopify.com/s/files/1/0433/3273/1038/files/1384751757.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006500.bin
ecc09ab8eb42fbc3798be7a99d046e6d5b5da76876ad04c2cd2b8f249da8e00f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6500 4792 bytes
font_01_sfnt_off0000755f.bin
46c66e708c5e40e7eb0cdf4ec3bd09c8be2f304e054f1180c3471a98c68b712e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x755F 10080 bytes
font_02_sfnt_off000097fd.bin
9aaf374d64521945a2d179b3de22a0ad451813c1e8d23897d9514ef9876b453b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x97FD 16216 bytes

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