Malicious PDF — malware analysis report

Static analysis result for SHA-256 27b9b6a06e8f2801…

MALICIOUS

PDF

43.7 KB Created: 2020-08-08 18:07:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 86333f1e6e6a230a7202fd911a3e51ec SHA-1: c52765ace771e2dfc5cfb93f8b93b8f9b59e15f7 SHA-256: 27b9b6a06e8f2801319ef3cea3962d21b31e7b9c27949c93b60e20b1a1433526
120 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to external PDFs hosted on various domains, including a known malicious redirector at ttraff.cc. This suggests a link farm or SEO poisoning attack designed to drive traffic to malicious infrastructure. The document body itself is largely unreadable binary data, but the presence of the malicious redirector URL is a strong indicator of malicious intent.

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=rockwool+ablative+coated+batt+pdf
    • http://files.clevelandchamberchoir.org/uploads/1/3/0/9/130969489/7898693.pdf
    • http://files.canineandequineranch.org/uploads/1/3/0/8/130874667/wuwowo-sifoxut.pdf
    • http://puleg.cwi2.com/uploads/1/3/0/9/130968917/mipijote.pdf
    • http://files.blueridgepokemon.com/uploads/1/3/1/3/131382387/pobujabalofek.pdf
    • https://cdn.shopify.com/s/files/1/0430/9273/8201/files/davamalirires.pdf
    • https://cdn.shopify.com/s/files/1/0435/7039/7352/files/29176118922.pdf
    • https://cdn.shopify.com/s/files/1/0430/3477/1610/files/42881191321.pdf
    • https://cdn.shopify.com/s/files/1/0431/6302/5567/files/15309353494.pdf
    • https://cdn.shopify.com/s/files/1/0434/7019/2802/files/28063519521.pdf
    • https://cdn.shopify.com/s/files/1/0434/7258/4861/files/jenox.pdf
    • https://cdn.shopify.com/s/files/1/0432/9429/4171/files/html_to_linux_command.pdf
    • https://cdn.shopify.com/s/files/1/0428/5346/6271/files/jewogulonexipixakiwes.pdf
    • https://cdn.shopify.com/s/files/1/0440/8626/3960/files/29566199196.pdf
    • https://cdn.shopify.com/s/files/1/0434/8480/7334/files/warubegoreg.pdf
    • https://cdn.shopify.com/s/files/1/0435/8832/1437/files/arduino_uno_pin_description.pdf
    • https://cdn.shopify.com/s/files/1/0437/7329/6801/files/.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_off00006486.bin
04ada8f0e01adb6ace6860cd61cee03790ada349f28a978854f6fb90d20b20f8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6486 5240 bytes
font_01_sfnt_off00007692.bin
baeb26385390f7adaaf4fa39fb41a041f28a3595c3b5269d7d09232ee409e3cd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7692 13912 bytes

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