Malicious PDF — malware analysis report

Static analysis result for SHA-256 07f4b07e6cd51c3d…

MALICIOUS

PDF

49.8 KB Created: 2020-08-14 06:27:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 39f3590652a44e2fc6a4ebc826041b67 SHA-1: 8b012a302d50c25490f0d3d74f80aeee7b429d5d SHA-256: 07f4b07e6cd51c3dc00cc89d71c69761bcd88f43f633ac208be164568831bb13
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, with at least one pointing to known malicious redirector infrastructure. The ML classifier also strongly indicated maliciousness. The document body contains garbled text but includes the malicious URL and several benign-looking Shopify URLs, suggesting a link farm or redirection attempt. No scripts were extracted, but the presence of numerous links indicates an attempt to lure users to external, potentially harmful, sites.

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.cc/pify?keyword=carpenter+brut+turbo+killer
    • http://files.accentbottlelights.com/uploads/1/3/1/3/131398507/3888356.pdf
    • http://files.mariatzortziou.com/uploads/1/3/0/7/130775679/5eaf56fbabbba.pdf
    • http://files.flemingtonwomansclub.org/uploads/1/3/2/8/132814342/xapuzikisuf.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0428/5346/6271/files/50175475359.pdf
    • https://cdn.shopify.com/s/files/1/0431/8799/4792/files/pazumunowugonewizejikisa.pdf
    • https://cdn.shopify.com/s/files/1/0428/1827/3446/files/acids_in_fruits.pdf
    • https://cdn.shopify.com/s/files/1/0448/6837/0594/files/beclometasona_spray_bula.pdf
    • https://cdn.shopify.com/s/files/1/0433/9869/3022/files/bethink_yourselves_leo_tolstoy.pdf
    • https://cdn.shopify.com/s/files/1/0430/6396/7906/files/nalagifawejawufajugid.pdf
    • https://cdn.shopify.com/s/files/1/0429/8548/8543/files/getigudukogatu.pdf
    • https://cdn.shopify.com/s/files/1/0428/5346/6271/files/97762357389.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/nulifagavukaxubodipiripu.pdf
    • https://cdn.shopify.com/s/files/1/0428/2230/3911/files/sharepoint_2010_tutorial.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/72274594547.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/nuruge.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000078bb.bin
034afa1a39fa0c1d346c4eec6be57a89837c8c247ddfc959a0da8e23feca5417		 pdf-font-stream PDF embedded font (sfnt) at offset 0x78BB 4744 bytes
font_01_sfnt_off000088e3.bin
6d20deaa511225ef8e06bfeba2454593c0d414ebc156b0602bacd021639a01a2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x88E3 10464 bytes
font_02_sfnt_off0000ac29.bin
b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAC29 4324 bytes

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