Malicious PDF — malware analysis report

Static analysis result for SHA-256 08b85a0d94615f7d…

MALICIOUS

PDF

56.0 KB Created: 2020-08-23 08:26:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4aab8eb7c0e3b1638b1a16bd4c889b43 SHA-1: ec90fcd63eca0bfc26fb3787e7f4e4431bbbf9a6 SHA-256: 08b85a0d94615f7d211f9be94ecac48dadd587f90fba74788c6bd7fe82e5df22
154 Risk Score

Malware Insights

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

The PDF contains embedded links, with one prominently pointing to a known malicious redirector. The document body, though obfuscated, includes text suggesting a lure related to 'Peaky Blinders season 5' and the redirector URL. The presence of numerous external PDF links, many hosted on Shopify, suggests a link farm or SEO poisoning tactic to distribute malicious content.

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=peaky+blinders+season+5+complete
    • http://files.ldgreen.org/uploads/1/3/1/3/131383981/2974974.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0438/0105/1293/files/phenol_chloroform_reaction.pdf
    • https://cdn.shopify.com/s/files/1/0429/6504/1308/files/90314817308.pdf
    • https://cdn.shopify.com/s/files/1/0430/8231/7975/files/nowakizomunalevilid.pdf
    • https://cdn.shopify.com/s/files/1/0430/3532/8663/files/25321004438.pdf
    • https://cdn.shopify.com/s/files/1/0432/8567/6192/files/29829802510.pdf
    • https://cdn.shopify.com/s/files/1/0428/7420/8415/files/89064099491.pdf
    • https://cdn.shopify.com/s/files/1/0434/2589/0466/files/vemezobuduz.pdf
    • https://cdn.shopify.com/s/files/1/0440/2829/7381/files/11824361740.pdf
    • https://cdn.shopify.com/s/files/1/0428/7214/4038/files/xoboliwagotibuwasales.pdf
    • https://cdn.shopify.com/s/files/1/0429/0543/6326/files/38519137810.pdf
    • https://cdn.shopify.com/s/files/1/0429/4760/8730/files/tufilipipikinunagajebuk.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/serananovuja.pdf
    • https://cdn.shopify.com/s/files/1/0430/1769/9477/files/fabuzasewibisegole.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
    • http://sinhala.sourceforge.net/
    • http://sinhala.cvs.sourceforge.net/viewvc/*checkout*/sinhala/sinhala/fonts/CREDITS
    • http://www.gnu.org/licenses/gpl-2.0.html

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005888.bin
6b6ab22df1ede987839410c4c54e9455e3e51824da12966e539983e6e133d563		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5888 11564 bytes
font_01_sfnt_off00007e0a.bin
03a8848064deafec0ee461974520089a12095d67fcafc169980e2820d303bebe		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7E0A 5652 bytes
font_02_sfnt_off000090ea.bin
de022f94e40296d447c9694e9298697e67fa95da8e18d8a9c6a925d7650d7b1f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x90EA 10112 bytes
font_03_sfnt_off0000af73.bin
ec3ec112ffa3ae529a0116f136eaaa12ca42021f8bb2b5ed06899a8a530be732		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAF73 10240 bytes

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