Malicious PDF — malware analysis report

Static analysis result for SHA-256 4bd4389beb46d8e4…

MALICIOUS

PDF

43.0 KB Created: 2020-08-08 05:58:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3a79d359e274aaf2857f8a538e0d510c SHA-1: fe30a6ef4c842279bbe76069a4186cbd763362f6 SHA-256: 4bd4389beb46d8e47f9cc03ea9a3afa3415499792236e79501155f4a0ff4acb8
120 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to a redirector service (ttraff.com) known for malicious activity. The document body, though heavily obfuscated, contains references to academic applications and URLs, suggesting a lure to trick users into downloading further malicious content. The presence of numerous links, including those hosted on Shopify, indicates a link farm strategy to distribute malicious payloads or phishing pages.

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.com/pify?keyword=cv+for+phd+application+pdf
    • http://timugajik.florida-oa.com/uploads/1/3/2/6/132681513/4635454.pdf
    • http://fesigupo.aquaminerals.net/uploads/1/3/2/7/132740930/29f404a6e8.pdf
    • http://files.lilypadplanet.com/uploads/1/3/1/3/131384113/diwavuburaboweje.pdf
    • http://xelubo.thelightingsummit.com/uploads/1/3/1/4/131454024/3369954.pdf
    • http://files.maraudersfootball.net/uploads/1/3/2/6/132681928/xekeb.pdf
    • https://cdn.shopify.com/s/files/1/0447/8697/4869/files/lima_barreto.pdf
    • https://cdn.shopify.com/s/files/1/0441/3286/0056/files/bobejabonaripe.pdf
    • https://cdn.shopify.com/s/files/1/0431/8131/0114/files/begepo.pdf
    • https://cdn.shopify.com/s/files/1/0432/3488/5792/files/games_like_stardoll.pdf
    • https://cdn.shopify.com/s/files/1/0432/6942/3257/files/77594701499.pdf
    • https://cdn.shopify.com/s/files/1/0430/8638/1210/files/17542890941.pdf
    • https://cdn.shopify.com/s/files/1/0437/8886/1602/files/value_added_tax_act_1991.pdf
    • https://cdn.shopify.com/s/files/1/0427/7246/3772/files/dabivizikivarikulesulut.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/musigusuwekun.pdf
    • https://cdn.shopify.com/s/files/1/0435/6790/6979/files/madevetew.pdf
    • https://cdn.shopify.com/s/files/1/0430/5852/8405/files/attachment_styles_in_relationships.pdf
    • https://cdn.shopify.com/s/files/1/0434/4211/0631/files/wunuwewoxodivubinexik.pdf
    • https://cdn.shopify.com/s/files/1/0434/4751/7341/files/nonerejuzasokakijutiwuvo.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_off000069c0.bin
c75fc313e9dd0d21ef7ceeac519b187c68d21d7f2bd1eca9aa37fd219a0b71c0
pdf-font-stream PDF embedded font (sfnt) at offset 0x69C0 5032 bytes
font_01_sfnt_off00007ade.bin
b1b9d85397396d9ba23cc2de100a63e9d7296a43667aac7ece70f014a8d25366
pdf-font-stream PDF embedded font (sfnt) at offset 0x7ADE 10500 bytes