Malicious PDF — malware analysis report

Static analysis result for SHA-256 0554866237205946…

MALICIOUS

PDF

43.1 KB Created: 2020-08-05 05:54:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0ae32b19a5130739b9d122f2bffe470b SHA-1: 354bccb9863cfce517e7b5c244eb50efb75aec00 SHA-256: 055486623720594660d7fe5d00a563409f77a7b0409614fcb69c0010447f8c67
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, many of which point to a redirector service known for malicious activity. The document body, though obfuscated, contains a URL that matches the redirector found in the heuristics. This suggests the primary goal is to redirect the user to malicious content, likely for phishing or malware distribution.

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=alif+lam+mim+pdf+download
    • http://files.makemygrassgreen.com/uploads/1/3/0/9/130969621/zinojozovap-dotowufoxubi-kipebifa-tukakidaluxa.pdf
    • http://files.frankrostron.com/uploads/1/3/0/8/130813458/ruwodemupanow_zenupolasekufix_powuj.pdf
    • http://virezodus.parkersformalwear.com/uploads/1/3/1/0/131070722/gabopiwuli-nepip-juxovovifawin.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/4968/0032/files/76732821773.pdf
    • https://cdn.shopify.com/s/files/1/0435/3448/3616/files/causes_of_protein_energy_malnutrition.pdf
    • https://cdn.shopify.com/s/files/1/0431/1928/0288/files/hr_management_system.pdf
    • https://cdn.shopify.com/s/files/1/0427/5650/5756/files/1499584110.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/949986333.pdf
    • https://cdn.shopify.com/s/files/1/0432/2358/0830/files/active_learning_exercises_for_research_methods_in_social_sciences.pdf
    • https://cdn.shopify.com/s/files/1/0440/6935/5670/files/cms-_1500_form.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/nowivozepax.pdf
    • https://cdn.shopify.com/s/files/1/0428/1381/6995/files/history_alive_the_ancient_world.pdf
    • https://cdn.shopify.com/s/files/1/0437/6176/2455/files/59744171684.pdf
    • https://cdn.shopify.com/s/files/1/0428/4832/1692/files/zibetiduxeb.pdf
    • https://cdn.shopify.com/s/files/1/0437/8319/2738/files/george_washington_eggnog.pdf
    • https://cdn.shopify.com/s/files/1/0432/3105/1931/files/kawukubugab.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_off00006c35.bin
4044fc9bd08f5eab945252b00a6b066b8f0e6381b9d09f92a0200a4a66547d3d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6C35 4992 bytes
font_01_sfnt_off00007d39.bin
d3b365370cdc87f0fd386c45e175842cda0831f84fe2fa02c7876d94db79e908		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7D39 10128 bytes

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