Malicious PDF — malware analysis report

Static analysis result for SHA-256 74f313dd5189e90e…

MALICIOUS

PDF

42.1 KB Created: 2020-08-05 01:56:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4215ade8434bd57efa60d285006e7c5a SHA-1: 60a83d5c0d02322ec752cd44c06cffca361ae848 SHA-256: 74f313dd5189e90e0470dc81096454ad0069579d3c2171e76a675327751906c4
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a link farm and a specific URL pointing to a redirector, indicating a phishing or scam attempt. The document body, though heavily obfuscated, contains the primary malicious URL, suggesting it's intended to lure users into clicking through to malicious infrastructure. The presence of numerous external links, many hosted on Shopify, further supports the link farm heuristic.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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=billy+gene+marketing+pdf
    • http://files.norwegianmade.com/uploads/1/3/2/8/132815742/4cbea0f.pdf
    • http://files.cuatropuntos.org/uploads/1/3/0/7/130739175/waridojijuneg.pdf
    • http://files.nellisvineyards.com/uploads/1/3/1/4/131437660/4746930.pdf
    • http://sizisivex.josh-bryant.com/uploads/1/3/1/4/131438216/boxojozod_jogedegesif.pdf
    • http://files.impressivedfw.com/uploads/1/3/0/8/130814120/kiveweponubu.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/5313/7576/files/71746342210.pdf
    • https://cdn.shopify.com/s/files/1/0433/7664/0156/files/pogonagakix.pdf
    • https://cdn.shopify.com/s/files/1/0429/2929/1427/files/10314007757.pdf
    • https://cdn.shopify.com/s/files/1/0429/6923/5619/files/cpec_and_gilgit_baltistan.pdf
    • https://cdn.shopify.com/s/files/1/0437/8905/8206/files/common_english_sentences_for_teachers.pdf
    • https://cdn.shopify.com/s/files/1/0433/0507/4838/files/89064109013.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/lutekalejore.pdf
    • https://cdn.shopify.com/s/files/1/0440/0028/0726/files/cinema_camera_angles.pdf
    • https://cdn.shopify.com/s/files/1/0434/9470/3270/files/dictation_exercises_for_english_learners.pdf
    • https://cdn.shopify.com/s/files/1/0432/0477/2000/files/jumutuwat.pdf
    • https://cdn.shopify.com/s/files/1/0439/7613/0718/files/a_tale_of_three_kings.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006648.bin
07f49c1f1e728887f60cf9e47f85f08513fb76007adf2852e09cbbbbb35592bf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6648 5400 bytes
font_01_sfnt_off0000789e.bin
1cdf174ec7e7f0cebba0c8703437096305deda7af3884958c38439579347c03c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x789E 10260 bytes

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