Malicious PDF — malware analysis report

Static analysis result for SHA-256 323b343dc54ca2b9…

MALICIOUS

PDF

39.2 KB Created: 2020-08-21 09:21:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4434fbe129580285fafc96b615be323f SHA-1: e12c06e49234b508f351cf57ee363db423a4ed79 SHA-256: 323b343dc54ca2b94b12acd10ad9500a31434e02c60066478b63c63df1a2cfc9
120 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic firing indicating a malicious redirector. The primary malicious URL, https://ttraff.com/pify?keyword=approximation+questions+pdf+for+rrb+po, is likely used to redirect users to a malicious site. The document body, though heavily obfuscated, contains references to the same malicious URL and other Shopify-hosted PDFs, suggesting a link farm or SEO poisoning tactic to distribute 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.com/pify?keyword=approximation+questions+pdf+for+rrb+po
    • http://files.thevillagelhc.org/uploads/1/3/1/4/131409098/gewazixoniz-difedoduxijob.pdf
    • https://cdn.shopify.com/s/files/1/0436/3000/2336/files/hepatitis_c_treatment_guidelines.pdf
    • https://cdn.shopify.com/s/files/1/0434/0586/9217/files/fujisofolalufapikoz.pdf
    • https://cdn.shopify.com/s/files/1/0429/0917/1879/files/minecraft_base_map.pdf
    • https://cdn.shopify.com/s/files/1/0430/0147/9321/files/lixukafare.pdf
    • https://cdn.shopify.com/s/files/1/0437/1726/3510/files/28145138468.pdf
    • https://cdn.shopify.com/s/files/1/0437/9593/9488/files/83362434717.pdf
    • https://cdn.shopify.com/s/files/1/0433/8132/5980/files/termination_during_probation_letter_template.pdf
    • https://cdn.shopify.com/s/files/1/0460/5755/4075/files/57990940794.pdf
    • https://cdn.shopify.com/s/files/1/0434/7972/8281/files/dovozutijulutemiwebade.pdf
    • https://cdn.shopify.com/s/files/1/0431/7921/2959/files/jiputekonaku.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_off00005737.bin
faa6db491619d141a4bdb34698db9f9ede36cb71254c76ee59653e10f85faedf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5737 5480 bytes
font_01_sfnt_off000069b6.bin
2fba4363da160119a1fff0079c5edbdcbf9f1d3e28948d7e7e26d688f80b8837		 pdf-font-stream PDF embedded font (sfnt) at offset 0x69B6 11428 bytes

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