Malicious PDF — malware analysis report

Static analysis result for SHA-256 1d4890b085d55e49…

MALICIOUS

PDF

37.8 KB Created: 2020-08-24 22:13:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a904e3178d1c128f71a41cf596c2ef59 SHA-1: 7764b2c55825f8b155e3ee5b93a593758324bbe8 SHA-256: 1d4890b085d55e49d910061929a8ff94281d27add5bd1f32c3da06f88aa85234
128 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains numerous embedded links, a common tactic for SEO poisoning and phishing. One critical heuristic identified a link to a known malicious redirector at 'https://ttraff.cc/pify?keyword=bunco+score+sheets+to+print'. The document body also contains a visual download lure, reinforcing the phishing attempt. While the document body is heavily obfuscated, the presence of the malicious redirector and the link farm strongly suggest a phishing or malware distribution attempt.

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=bunco+score+sheets+to+print
    • http://xiber.caribbeanfusion.co.uk/uploads/1/3/2/6/132682883/27f6b2eb10f28.pdf
    • http://files.synergycs.net/uploads/1/3/1/3/131397973/lefenam.pdf
    • https://cdn.shopify.com/s/files/1/0457/3734/5180/files/shining_force_1_promotion_guide.pdf
    • https://cdn.shopify.com/s/files/1/0427/5575/2103/files/pdf_rotate_single_page.pdf
    • https://cdn.shopify.com/s/files/1/0435/2658/6520/files/megan_rock_of_lov.pdf
    • https://cdn.shopify.com/s/files/1/0434/5351/3881/files/webepegamab.pdf
    • https://cdn.shopify.com/s/files/1/0434/4050/4999/files/azotemia_postrenal.pdf
    • https://cdn.shopify.com/s/files/1/0430/5915/1009/files/certified_ethical_hacking_version_9.pdf
    • https://cdn.shopify.com/s/files/1/0431/9654/7230/files/foxewo.pdf
    • https://cdn.shopify.com/s/files/1/0434/4309/3660/files/evangelhos_apcrifos_download.pdf
    • https://cdn.shopify.com/s/files/1/0427/7692/0220/files/70202166558.pdf
    • https://cdn.shopify.com/s/files/1/0438/5295/5810/files/avery_5160_labels.pdf
    • https://cdn.shopify.com/s/files/1/0429/5704/5913/files/point_click_care_user_manual.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_off00005758.bin
9adae53ec19b267376d8bf5f4b87373bb6c54cd310372f1346fe16ff2e06aa97		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5758 4828 bytes
font_01_sfnt_off000067b6.bin
1a0e4a94ad2875dd0fa4c566a8aacd8b02505697c7dd963735b9212030b4a610		 pdf-font-stream PDF embedded font (sfnt) at offset 0x67B6 10364 bytes

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