Malicious PDF — malware analysis report

Static analysis result for SHA-256 e4b53e275b30c0b0…

MALICIOUS

PDF

34.6 KB Created: 2020-08-14 12:32:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6c4f2407fc8b95188d4cd091e63ff7f6 SHA-1: a1d4e55f0b9f5ac3f2d65fcd7b62e02b53ca0cbb SHA-256: e4b53e275b30c0b0d145048905b916f3ac48af636a0f2d75227a1f5462d7ade9
120 Risk Score

Malware Insights

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

The PDF contains a mass of external links, with one specifically pointing to a known malicious redirector. The document body text, though partially corrupted, includes the same suspicious URL, suggesting a lure to a malicious site. The presence of numerous PDF links, many hosted on Shopify, indicates a link farm strategy, likely for SEO poisoning or distributing malicious content.

Heuristics 3

  • 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.
  • 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=ammi+ammi+video+song
    • http://files.sutterandassociates.com/uploads/1/3/1/3/131380175/subewun.pdf
    • http://wizutom.expansiontheoryproductions.com/uploads/1/3/2/7/132741024/07e417fdba.pdf
    • http://files.tungbrushph.com/uploads/1/3/0/7/130739996/9506972.pdf
    • http://files.mauricesports.com/uploads/1/3/0/8/130873795/zipakagowewelab_wivirakukuru_jabun_rusilevibibekoz.pdf
    • http://files.powerlandrealty.com/uploads/1/3/2/6/132681317/28c3cd58.pdf
    • https://cdn.shopify.com/s/files/1/0434/7399/3890/files/73269439588.pdf
    • https://cdn.shopify.com/s/files/1/0433/8273/5006/files/zoho_aptitude_questions_with_answers.pdf
    • https://cdn.shopify.com/s/files/1/0434/6193/5261/files/millermatic_211_manual.pdf
    • https://cdn.shopify.com/s/files/1/0436/2502/1603/files/baldur_s_gate_2_faq.pdf
    • https://cdn.shopify.com/s/files/1/0434/8326/7236/files/sekobixunefuwajuka.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/tadigepulimo.pdf
    • https://cdn.shopify.com/s/files/1/0430/5430/1338/files/47171069230.pdf
    • https://cdn.shopify.com/s/files/1/0434/1540/4711/files/techos_verdes_tesis.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/5578033559.pdf
    • https://cdn.shopify.com/s/files/1/0433/4800/0922/files/subwoofer_amplifier_circuit_diagram.pdf
    • https://cdn.shopify.com/s/files/1/0435/3818/6394/files/bituminous_pavement_construction.pdf
    • https://cdn.shopify.com/s/files/1/0432/6631/0299/files/34199871876.pdf
    • https://cdn.shopify.com/s/files/1/0431/1787/1255/files/best_mods_for_skyrim_special_edition.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_off000049fe.bin
9007af24adcb81ed63397e3cd62b7160de1b8e294e224430b86ada6e3b313101
pdf-font-stream PDF embedded font (sfnt) at offset 0x49FE 5068 bytes
font_01_sfnt_off00005b2c.bin
0d8521861c5796247f45ffd5017e1f7f670adb39cee12187f9c8a55afbeec4cd
pdf-font-stream PDF embedded font (sfnt) at offset 0x5B2C 10104 bytes