Malicious PDF — malware analysis report

Static analysis result for SHA-256 2f1e80d3d4ab6b2e…

MALICIOUS

PDF

41.1 KB Created: 2020-08-22 00:17:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b4b49348abfdc988c433163d0e7477e0 SHA-1: 1c157b48990ec249b5660208aec85c4bc0a607c1 SHA-256: 2f1e80d3d4ab6b2e788d7fb7c425849088e587b2d96f0a80df38c9d133d23dad
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Phishing: Spearphishing Attachment T1059.001 Command and Scripting Interpreter: PowerShell

The PDF contains a link farm and a malicious redirector URL, indicating an attempt to drive traffic to malicious infrastructure. The document body, though heavily obfuscated, contains the same malicious URL and references to 'editing video online android', suggesting a lure. The presence of numerous external PDF links, many hosted on Shopify, further supports the link farm heuristic.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.ru/pify?keyword=editing+video+online+android
    • http://files.threecreekaussies.com/uploads/1/3/2/7/132710655/sujut.pdf
    • http://wufesoxog.greenhousewivesbathco.com/uploads/1/3/1/4/131410399/vawege.pdf
    • https://cdn.shopify.com/s/files/1/0432/0559/1200/files/33641071703.pdf
    • https://cdn.shopify.com/s/files/1/0432/4986/0765/files/42869577124.pdf
    • https://cdn.shopify.com/s/files/1/0435/8668/3037/files/merge_sort_javascript.pdf
    • https://cdn.shopify.com/s/files/1/0431/2875/0234/files/latebanavofizik.pdf
    • https://cdn.shopify.com/s/files/1/0434/1324/2005/files/84847912934.pdf
    • https://cdn.shopify.com/s/files/1/0437/8253/7365/files/4398715053.pdf
    • https://cdn.shopify.com/s/files/1/0461/0218/4100/files/7660473618.pdf
    • https://cdn.shopify.com/s/files/1/0434/0023/3110/files/ust_medical_certificate_form.pdf
    • https://cdn.shopify.com/s/files/1/0448/2344/5666/files/thiruvalluvar_university_b._com_syllabus_2020.pdf
    • https://cdn.shopify.com/s/files/1/0430/7235/6505/files/cherry_bomb_movie.pdf
    • https://cdn.shopify.com/s/files/1/0430/9044/4445/files/liwulugoroxofuxi.pdf
    • https://cdn.shopify.com/s/files/1/0430/3686/8762/files/28756368586.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_off000062ea.bin
4394c5e35c389b6d4e05bdefc7674318ce8b5a837eef4a06188fa243d2cc2636		 pdf-font-stream PDF embedded font (sfnt) at offset 0x62EA 4832 bytes
font_01_sfnt_off00007371.bin
3cea3bdea70ed590123bea5432bf72b88e767cf584136e6a32c605197d3f5a92		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7371 10592 bytes

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