Malicious PDF — malware analysis report

Static analysis result for SHA-256 f05fe276778b300a…

MALICIOUS

PDF

41.3 KB Created: 2020-09-18 07:47:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9e7388d635c436337ab0e8f440be8c49 SHA-1: d81f280f0e3a103974f8b192a0dc874f4fd01dc3 SHA-256: f05fe276778b300ab4a0cebedf13ec44de4708621076ce9c1409be4a34dfe467
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF was flagged by multiple critical heuristics for containing malicious redirector links and a link farm. The document body, though heavily obfuscated, contains URLs that are consistent with these findings. The primary attack pattern involves luring users to click on malicious links, likely for phishing or to download further malware.

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.link/wix?keyword=in+an+administered+vertical+marketing+system
    • http://files.pirg-research.com/uploads/1/3/1/4/131437508/kadosawosimidadilox.pdf
    • http://laben.lcaclassicalhistory.com/uploads/1/3/2/8/132814930/8d7d5.pdf
    • http://nivigu.bottlealleytheatre.com/uploads/1/3/1/3/131381806/detiluwi_vovorax_gelona.pdf
    • https://78586785-fc5e-444c-967d-f64c558c1e10.filesusr.com/ugd/1a1092_e3fbf6671782470eb556ad2a3b2db661.pdf?index=true
    • https://6cdc399d-46eb-4dac-a939-1c1b8a8f02c3.filesusr.com/ugd/7ef0dc_167c80200abb4c00af834f359d2987be.pdf?index=true
    • https://64751603-58df-468e-a939-28e1384b2aac.filesusr.com/ugd/4dbf3f_dde72cf4ca334bd4ac11d1d661b9f9b1.pdf?index=true
    • https://0acaeb36-ac53-47d4-ad22-b937bf2ed6e8.filesusr.com/ugd/1e11d0_36f59d4567c94823b4a477c195cd1d51.pdf?index=true
    • https://f99a8756-bc67-4d1b-add1-a331575b9858.filesusr.com/ugd/760101_36ad47caecb440f49be934ca0bce7119.pdf?index=true
    • https://cdn.shopify.com/s/files/1/0435/3651/5221/files/massachusetts_alimony_child_support_guidelines.pdf
    • https://cdn.shopify.com/s/files/1/0429/9702/2879/files/questes_administrao_pblica_art_37_ao_41.pdf
    • https://cdn.shopify.com/s/files/1/0428/1021/2518/files/book_report_the_wonderful_wizard_of_oz.pdf
    • https://cdn.shopify.com/s/files/1/0462/3604/1376/files/45103211821.pdf
    • https://cdn.shopify.com/s/files/1/0449/2269/9943/files/53362328271.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_off00006341.bin
201a49f30788875e24de155bd96d19fb0f189d1b42f96daf4608d171fe1161db		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6341 5420 bytes
font_01_sfnt_off000075a7.bin
d288a1ae53e3a51e879dd59887fcf14b1fb79d2fd3fe8ce233e38445bf0537ef		 pdf-font-stream PDF embedded font (sfnt) at offset 0x75A7 10712 bytes

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