Malicious PDF — malware analysis report

Static analysis result for SHA-256 b0f0663c0d6b8b78…

MALICIOUS

PDF

44.8 KB Created: 2020-08-18 14:43:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f9667d34efda42a27c0eb354a15754da SHA-1: 7d55e642dd4f57cd6a82ca22a10c0b76df89db29 SHA-256: b0f0663c0d6b8b787bff3b2e1b0d613a0278d7915844dde235f803b0bea509d4
128 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a link farm and a specific malicious redirector URL, indicating a phishing or scam attempt. The document body, though heavily obfuscated, contains the malicious URL and a lure related to a 'class attendance register pdf'. The presence of a visual download button further supports a social engineering attack. The primary malicious URL is https://ttraff.cc/pify?keyword=class+attendance+register+pdf, which redirects to a PDF hosted on cdn.shopify.com.

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.
  • 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
  • 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=class+attendance+register+pdf
    • http://xujawaler.anchoragebestcleaningservice.com/uploads/1/3/1/6/131606218/miwuxujotaguzufisuv.pdf
    • http://files.felicitasdoula.com/uploads/1/3/1/6/131606537/vazez-pexajano-sagotegojof.pdf
    • https://cdn.shopify.c
    • https://cdn.shopify.com/s/files/1/0431/2776/7206/files/93328457728.pdf
    • https://cdn.shopify.com/s/files/1/0454/1834/8712/files/tipajaxed.pdf
    • https://cdn.shopify.com/s/files/1/0428/1312/8863/files/savujoxojibosalazuzatov.pdf
    • https://cdn.shopify.com/s/files/1/0435/0833/4744/files/gidukatajudex.pdf
    • https://cdn.shopify.com/s/files/1/0431/5165/5061/files/authenticity_definition.pdf
    • https://cdn.shopify.com/s/files/1/0429/7208/6435/files/dog_knot_wife.pdf
    • https://cdn.shopify.com/s/files/1/0431/7085/7124/files/24049552428.pdf
    • https://cdn.shopify.com/s/files/1/0435/9297/4499/files/bricks_and_mortar_definition.pdf
    • https://cdn.shopify.com/s/files/1/0430/6308/3170/files/33359719012.pdf
    • https://cdn.shopify.com/s/files/1/0437/5746/9845/files/chronic_alcoholism_treatment_guidelines.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007033.bin
da80e9aff2e1ea36237fe33ce38de236e729a2461bbfdd388db866623a038e89		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7033 5228 bytes
font_01_sfnt_off00008204.bin
0a3c0a2eb79d12bbc942cbe8a642057231b70f1a5a8b21f2e88ed5d00bff6f58		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8204 10552 bytes

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