Malicious PDF — malware analysis report

Static analysis result for SHA-256 ea3b795daf196300…

MALICIOUS

PDF

47.8 KB Created: 2020-08-21 03:26:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bba7a8ebb09876d99dbcbabb982f4287 SHA-1: 2f569fc266d5da8637a53f16c4aa02e3dcba6547 SHA-256: ea3b795daf1963007a8c6edad23743c0c447e28b472e5c5bd3baa8d67ba3cf52
128 Risk Score

Malware Insights

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

The PDF contains multiple heuristics indicating malicious intent, including a critical finding for a PDF redirector link pointing to 'ttraff.com'. Additionally, it exhibits characteristics of a PDF link farm, with numerous external links, many hosted on Shopify. The document body, though heavily obfuscated, contains the same malicious URL found in the heuristics. The presence of a redirector suggests an attempt to lead the user to a malicious site, likely for phishing or malware delivery.

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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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=acr+contrast+manual+breast+feeding
    • http://files.zhangtong.info/uploads/1/3/0/7/130776826/00d21c0ae.pdf
    • http://rijika.rosemaryeagle.com/uploads/1/3/0/9/130969744/revojivusisag.pdf
    • https://cdn.shopify.com/s/files/1/0448/5578/7681/files/uptet_2018_answer_key_primary.pdf
    • https://cdn.shopify.com/s/files/1/0431/0417/4233/files/sumojofezu.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/jikas.pdf
    • https://cdn.shopify.com/s/files/1/0434/8579/0358/files/94157946395.pdf
    • https://cdn.shopify.com/s/files/1/0448/1282/8833/files/perioperative_management_of_anticoagulant_and_antiplatelet_therapy.pdf
    • https://cdn.shopify.com/s/files/1/0432/8429/9936/files/puxodugukifigatunafo.pdf
    • https://cdn.shopify.com/s/files/1/0432/4481/4500/files/wusujudim.pdf
    • https://cdn.shopify.com/s/files/1/0431/7547/7407/files/35256445968.pdf
    • https://cdn.shopify.com/s/files/1/0441/2545/4488/files/streamlabs_obs_64_bit_windows_10.pdf
    • https://cdn.shopify.com/s/files/1/0448/1715/4208/files/cutting_edge_upper_intermediate_student_book_download.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_off00007058.bin
6606f8861c22912a87af5b2dfca56c6e4953885a072c6cf1f01d56709924e836		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7058 5472 bytes
font_01_sfnt_off000082d0.bin
4b355d1f0104deb0a437874890d35d48dd94b6bb9bc096d55302e06b6e78586a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x82D0 15516 bytes

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