Malicious PDF — malware analysis report

Static analysis result for SHA-256 56688a32bcf6d7cf…

MALICIOUS

PDF

37.1 KB Created: 2020-08-11 18:40:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ba71f7d63c69a3d7eb3e2f3ca6289dd3 SHA-1: 6c3e7577df4b4a01f01bc2318dd9353b10609957 SHA-256: 56688a32bcf6d7cfa962c052fbc92574847061789f7ae5eca3c69342aa1939ef
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a critical heuristic firing for a malicious redirector link pointing to ttraff.com. Additionally, it exhibits characteristics of a PDF SEO link farm, with numerous embedded links, many hosted on Shopify. The ML classifier also strongly flagged this PDF as malicious. The document body, though heavily obfuscated, contains the primary malicious URL, suggesting the document's purpose is to lure users to this external site.

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.com/pify?keyword=arabiyyah+bayna+yadayk+1+pdf
    • http://javaxad.dougsgaragellc.com/uploads/1/3/1/4/131453850/53c3cbb6.pdf
    • http://files.hollygunn.com/uploads/1/3/1/1/131164153/3f116.pdf
    • http://files.becomingsarh.com/uploads/1/3/0/7/130739567/3400932.pdf
    • http://files.nebulawebsolutions.com.au/uploads/1/3/0/8/130813906/berabumabilep.pdf
    • https://cdn.shopify.com/s/files/1/0432/8787/1646/files/zepelofagugofa.pdf
    • https://cdn.shopify.com/s/files/1/0428/7699/3702/files/chinese_characters_worksheet.pdf
    • https://cdn.shopify.com/s/files/1/0451/2183/1065/files/45454334035.pdf
    • https://cdn.shopify.com/s/files/1/0437/9131/9201/files/agile_project_management_handbook_version_2._0.pdf
    • https://cdn.shopify.com/s/files/1/0431/3609/0267/files/42797844004.pdf
    • https://cdn.shopify.com/s/files/1/0431/8068/7520/files/jimemotokamawetefuses.pdf
    • https://cdn.shopify.com/s/files/1/0437/5799/4142/files/algorithms_in_a_nutshell_a_desktop_quick_reference.pdf
    • https://cdn.shopify.com/s/files/1/0447/4201/7173/files/79232475433.pdf
    • https://cdn.shopify.com/s/files/1/0440/7810/4728/files/xakizojutigobekijom.pdf
    • https://cdn.shopify.com/s/files/1/0430/6747/4087/files/15861395958.pdf
    • https://cdn.shopify.com/s/files/1/0431/2173/7882/files/88114277700.pdf
    • https://cdn.shopify.com/s/files/1/0432/1869/8400/files/software_quality_assurance_pressman.pdf
    • https://cdn.shopify.com/s/files/1/0431/6761/3087/files/top_100_bible_verses_to_memorize_kjv.pdf
    • https://cdn.shopify.com/s/files/1/0436/9701/2890/files/leril.pdf
    • https://cdn.shopify.com/s/files/1/0433/9377/7827/files/ridigolaxulixosajefivup.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_off00005111.bin
aecc5c6353b54409119e1015d890b506ba59b65abb983e3d4ca837779712757b
pdf-font-stream PDF embedded font (sfnt) at offset 0x5111 5268 bytes
font_01_sfnt_off000062fa.bin
5fa208574cf5439704f9f5e4dedc8cad3613b81bf1cec3533b5084984ed5ef7d
pdf-font-stream PDF embedded font (sfnt) at offset 0x62FA 10684 bytes