Malicious PDF — malware analysis report

Static analysis result for SHA-256 0869a2f7d72177f4…

MALICIOUS

PDF

41.6 KB Created: 2020-08-22 22:45:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 060d4c229ca973ed48ee0748b4b8b114 SHA-1: 6adec983183da997e35011350845810ef02f0565 SHA-256: 0869a2f7d72177f47f30e063b8c34d3a7f3a94162a2befdd9fbea7dcb8c83763
162 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.com, which is likely used to host or distribute further malicious content. The document also exhibits characteristics of a link farm, with numerous embedded links, suggesting a spam or SEO poisoning campaign. The presence of a 'download button' lure reinforces the malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=wallpapers+for+phone+screen
    • http://ketator.heritagefloristcortland.com/uploads/1/3/1/4/131453558/6172085.pdf
    • http://files.craicindesigns.com/uploads/1/3/1/3/131379761/zazawapekifu-zitevibise-mivorasob-sukedujeta.pdf
    • http://files.nacounseling.net/uploads/1/3/1/8/131858661/baloger-pejizugagar-dodurogowufig.pdf
    • http://gasez.speakupsantacruz.org/uploads/1/3/0/8/130814328/cc28ce30.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0440/5228/3542/files/15876134024.pdf
    • https://cdn.shopify.com/s/files/1/0439/4106/8958/files/keyboarding_online_hack.pdf
    • https://cdn.shopify.com/s/files/1/0428/3046/3142/files/49042790631.pdf
    • https://cdn.shopify.com/s/files/1/0435/5869/9159/files/porupixiwonoxebofuwa.pdf
    • https://cdn.shopify.com/s/files/1/0433/0107/7142/files/rokemopukiditometowe.pdf
    • https://cdn.shopify.com/s/files/1/0428/9003/5366/files/58639172288.pdf
    • https://cdn.shopify.com/s/files/1/0432/7342/0963/files/vexorexusilesudo.pdf
    • https://cdn.shopify.com/s/files/1/0429/4865/7311/files/jovufezuvu.pdf
    • https://cdn.shopify.com/s/files/1/0437/7929/3338/files/92889740020.pdf
    • https://cdn.shopify.com/s/files/1/0462/7352/7959/files/2316577435.pdf
    • https://cdn.shopify.com/s/files/1/0432/5274/4356/files/wezul.pdf
    • https://cdn.shopify.com/s/files/1/0430/7573/1616/files/retifijojafos.pdf
    • https://cdn.shopify.com/s/files/1/0427/5660/4070/files/xunipopubividere.pdf
    • https://cdn.shopify.com/s/files/1/0437/5799/4138/files/runokebovewom.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_off000065c9.bin
2c297575383befed074609c5bb7ebb331767d14368484555df590a21312cf97d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x65C9 5116 bytes
font_01_sfnt_off00007732.bin
ad85985546212074506a695ce849da25c384e5b6e7959f1861c65f26644e78be		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7732 9988 bytes

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