Malicious PDF — malware analysis report

Static analysis result for SHA-256 a866701d6c149421…

MALICIOUS

PDF

41.0 KB Created: 2020-08-03 03:06:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 45bd6c692865393e38c606eb85119510 SHA-1: 7805e31ec3a7394f401e742fbc6d3b89760d9cfa SHA-256: a866701d6c149421f910ce2c82640fd1cf71ad654789ab44c75e101e941f13c4
120 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with one specifically pointing to a malicious redirector. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK confirms this, indicating the document's primary purpose is to redirect users to malicious infrastructure. The presence of numerous other PDF links suggests a link farm strategy to obscure the malicious destination. No scripts were extracted, and the document body is largely unreadable binary data, but the embedded links are sufficient to determine the attack pattern.

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=california+hunter+education
    • http://files.twohappyhedgehogs.com/uploads/1/3/1/4/131437601/fimuzi-dovewarabik-ralotipane.pdf
    • http://files.drkaylee.us/uploads/1/3/1/4/131483719/86a84.pdf
    • http://files.lambdogdoodles.com/uploads/1/3/1/4/131453215/kubob.pdf
    • http://files.solidrockinternationalschoolofministries.com/uploads/1/3/0/7/130740044/6619f.pdf
    • https://cdn.shopify.com/s/files/1/0433/2371/9845/files/62951869653.pdf
    • https://cdn.shopify.com/s/files/1/0430/6134/6466/files/jorunuvad.pdf
    • https://cdn.shopify.com/s/files/1/0432/4448/6811/files/xusotexudapixa.pdf
    • https://cdn.shopify.com/s/files/1/0433/1044/8795/files/husqvarna_rz5424_manual.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/mijafovaginidobu.pdf
    • https://cdn.shopify.com/s/files/1/0431/5312/9640/files/21669463015.pdf
    • https://cdn.shopify.com/s/files/1/0436/0952/2339/files/tafigap.pdf
    • https://cdn.shopify.com/s/files/1/0431/6915/3181/files/zusom.pdf
    • https://cdn.shopify.com/s/files/1/0429/8250/6647/files/5577840657.pdf
    • https://cdn.shopify.com/s/files/1/0433/8129/3221/files/91206877918.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/96989945255.pdf
    • https://cdn.shopify.com/s/files/1/0432/7243/7910/files/83227859972.pdf
    • https://cdn.shopify.com/s/files/1/0430/0485/4426/files/6379923405.pdf
    • https://cdn.shopify.com/s/files/1/0433/4295/4661/files/92598467666.pdf
    • https://cdn.shopify.com/s/files/1/0440/4881/0149/files/jujigegoduje.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_off0000641f.bin
49f010e316b5341f9fb9dcb009bc51716c5c494a5af870e53b29a936d4a5d412
pdf-font-stream PDF embedded font (sfnt) at offset 0x641F 4836 bytes
font_01_sfnt_off00007488.bin
f2d5121eaf8038d53e5b0eb7576421a41cbcd458798a0dfc0923b051d434ab42
pdf-font-stream PDF embedded font (sfnt) at offset 0x7488 10032 bytes