Malicious PDF — malware analysis report

Static analysis result for SHA-256 2c6b732bc2fa68bc…

MALICIOUS

PDF

41.9 KB Created: 2020-08-05 02:16:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d80c7a7eefa8116aaa625596d524e032 SHA-1: c5b92b91f9ea3c02e448da44226cda8f65cabe64 SHA-256: 2c6b732bc2fa68bca7b308a16769f2135646438717f6f93ccfd7c827b1a7abb9
152 Risk Score

Malware Insights

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

The PDF contains a mass external link farm, with many links pointing to Shopify domains and several other unknown domains. One of the primary links, 'https://ttraff.cc/pify?keyword=catalogo+boticario+pdf+baixar', is identified as a known malicious redirector. The document body, though heavily obfuscated, contains similar URLs, suggesting a lure to download a catalog which ultimately leads to malicious infrastructure.

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=catalogo+boticario+pdf+baixar
    • http://files.concise-medical-copywriting.com/uploads/1/3/1/3/131379540/2250554.pdf
    • http://files.antiguoantiquesanddecorative.com/uploads/1/3/1/3/131383673/joselatitivigofof.pdf
    • http://files.aubreyejones.com/uploads/1/3/0/7/130775978/15b71427a31612.pdf
    • http://files.conwaycountycarecenter.com/uploads/1/3/0/7/130775145/nadotopajofameb.pdf
    • https://cdn.shopify.com/s/files/1/0434/4951/6199/files/ruwesenoduvikajetak.pdf
    • https://cdn.shopify.com/s/files/1/0429/4718/2759/files/12206532261.pdf
    • https://cdn.shopify.com/s/files/1/0431/3091/2934/files/77862396483.pdf
    • https://cdn.shopify.com/s/files/1/0434/1117/7626/files/dnd_xp_5e.pdf
    • https://cdn.shopify.com/s/files/1/0429/6481/1927/files/paxofavofasimarenufasofib.pdf
    • https://cdn.shopify.com/s/files/1/0439/9369/4366/files/28321829094.pdf
    • https://cdn.shopify.com/s/files/1/0431/5555/4458/files/82471295029.pdf
    • https://cdn.shopify.com/s/files/1/0432/9085/3541/files/bizopesi.pdf
    • https://cdn.shopify.com/s/files/1/0431/7125/0333/files/36231235533.pdf
    • https://cdn.shopify.com/s/files/1/0429/6019/1637/files/jefegimujozomimova.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/41718344304.pdf
    • https://cdn.shopify.com/s/files/1/0436/1266/8066/files/meponetepi.pdf
    • https://cdn.shopify.com/s/files/1/0432/5385/8472/files/2186335266.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_off00006504.bin
e9c100d6ea0e36e4eec0cdc1a08bd83a3081db62fcdca251373b87d4c4b9ac9a
pdf-font-stream PDF embedded font (sfnt) at offset 0x6504 5256 bytes
font_01_sfnt_off000076f5.bin
3b181f4534fac3b87bf95cddd1685abe5055e80ab50911dd8bdf59f874b9dfe3
pdf-font-stream PDF embedded font (sfnt) at offset 0x76F5 10536 bytes