Malicious PDF — malware analysis report

Static analysis result for SHA-256 e495d545c8593a11…

MALICIOUS

PDF

42.8 KB Created: 2020-08-17 16:28:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 00f4f628d8027a9cab661ca9ded8f8ac SHA-1: f1df0637f4d7006af648bf32ae7b1bcea8fe8c08 SHA-256: e495d545c8593a116d1749200f4a8e6def48b3aa1cc746e4df1b1857457ca86d
150 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to Shopify domains hosting other PDFs, suggesting a link farm for SEO manipulation or traffic redirection. One of these links, however, directs to a known malicious redirector. The ML classifier also strongly flagged this PDF as malicious. The presence of a link farm and a malicious redirector indicates an attempt to lure users to malicious content.

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.cc/pify?keyword=bong+bong+races+form+guide
    • http://xajifut.hemporiumbeads.com/uploads/1/3/0/9/130968984/498919472feb02.pdf
    • https://cdn.shopify.com/s/files/1/0433/9020/6115/files/sogimerezabimar.pdf
    • https://cdn.shopify.com/s/files/1/0430/0816/3993/files/89442437606.pdf
    • https://cdn.shopify.com/s/files/1/0430/0262/6202/files/87580914892.pdf
    • https://cdn.shopify.com/s/files/1/0444/0460/5094/files/cession_vehicule_en_ligne.pdf
    • https://cdn.shopify.com/s/files/1/0431/7190/5698/files/valojevisifujewerilofaxa.pdf
    • https://cdn.shopify.com/s/files/1/0433/7496/8986/files/alisha_chinai_songs.pdf
    • https://cdn.shopify.com/s/files/1/0430/2402/3715/files/bartolinitis_tratamiento_antibiotico.pdf
    • https://cdn.shopify.com/s/files/1/0436/3508/1374/files/famatelodupagunibujugilim.pdf
    • https://cdn.shopify.com/s/files/1/0433/4016/9366/files/minecraft_hunger_games_servers.pdf
    • https://cdn.shopify.com/s/files/1/0432/5317/0334/files/determine_the_slope_of_the_line_worksheet.pdf
    • https://cdn.shopify.com/s/files/1/0434/1497/8718/files/vakuwusotejomisutiligivo.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_off00006778.bin
5697daa57138440fb02b4c6769260a1c99c30d2f33744d33510ccc8b475b789c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6778 5496 bytes
font_01_sfnt_off00007a0a.bin
4c4acfb2b4df59abc6ec574e5cf6493bfc7e3ef31c536bc3a95f81e57e792faf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7A0A 10820 bytes

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