Malicious PDF — malware analysis report

Static analysis result for SHA-256 7ccd1e2e9eeb4de4…

MALICIOUS

PDF

39.3 KB Created: 2020-08-29 05:45:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5df3407d9d48e10cd140e694dd459778 SHA-1: f9b71a2c6af202ec2aba34bf2a60f8f32964b1ee SHA-256: 7ccd1e2e9eeb4de4b1806561fa7a6dfce5c1f351822b395be21cbbf35c391547
120 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 a link farm hosted on Shopify. One of these links, 'https://ttraff.ru/wix?keyword=concise+inorganic+chemistry+5th+edit', is identified as a malicious redirector. The document body, though heavily obfuscated, contains references to the same URL and appears to be designed to trick users into clicking these links, likely leading to further malicious content.

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.ru/wix?keyword=concise+inorganic+chemistry+5th+edit
    • https://cdn.shopify.com/s/files/1/0436/7794/1913/files/basorimiwufozevepiku.pdf
    • https://cdn.shopify.com/s/files/1/0432/0562/3972/files/48247191315.pdf
    • https://cdn.shopify.com/s/files/1/0432/7692/7142/files/arun_district_council_report_fly_tipping.pdf
    • https://cdn.shopify.com/s/files/1/0437/6897/1415/files/ornamental_fish_culture.pdf
    • https://cdn.shopify.com/s/files/1/0432/9046/0324/files/inspiring_quotes_for_students.pdf
    • https://cdn.shopify.com/s/files/1/0432/6578/6006/files/41939083574.pdf
    • https://cdn.shopify.com/s/files/1/0430/9575/2858/files/jakaxogokapikitavumisazig.pdf
    • https://cdn.shopify.com/s/files/1/0437/6159/8616/files/accounts_receivable_end_to_end_process.pdf
    • https://cdn.shopify.com/s/files/1/0439/7809/6798/files/carburateur_elementaire.pdf
    • https://cdn.shopify.com/s/files/1/0438/1710/7616/files/lapevifesokomefogopatetol.pdf
    • https://cdn.shopify.com/s/files/1/0448/0594/7558/files/95295862259.pdf
    • https://cdn.shopify.com/s/files/1/0430/6409/8970/files/saxunagemufevodedetavasu.pdf
    • https://cdn.shopify.com/s/files/1/0429/3401/0015/files/the_cask_of_amontillado_theme.pdf
    • https://cdn.shopify.com/s/files/1/0434/7543/5677/files/66823936968.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/bebupikisanomagidilu.pdf
    • https://cdn.shopify.com/s/files/1/0433/1651/0873/files/banenitanazik.pdf
    • https://cdn.shopify.com/s/files/1/0428/4976/3487/files/16494932565.pdf
    • https://cdn.shopify.com/s/files/1/0430/6495/0946/files/19087908553.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004e7a.bin
47e9a9e26d996a6bf6972d26b5762323a9fd3bff76f0046754060b9fbbe41b4d
pdf-font-stream PDF embedded font (sfnt) at offset 0x4E7A 5360 bytes
font_01_sfnt_off00006085.bin
db5b651375e5132426c58cceb6cfd1ad7cf383583a146e262ec3a20ba4f56633
pdf-font-stream PDF embedded font (sfnt) at offset 0x6085 9764 bytes
font_02_sfnt_off000081f5.bin
a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f
pdf-font-stream PDF embedded font (sfnt) at offset 0x81F5 4324 bytes