Malicious PDF — malware analysis report

Static analysis result for SHA-256 21c1086d6e2b0c1e…

MALICIOUS

PDF

37.8 KB Created: 2020-08-05 11:17:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 86a7bb3e0d1f3fb63bbf65256d78597e SHA-1: d09925c55665342c542ff20d0f6b19c4185151c1 SHA-256: 21c1086d6e2b0c1ecc534ff1c3daeadf5a555dc12c5f2cddec2c55d56afccf52
120 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one identified as a malicious redirector. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK indicates that the link https://ttraff.cc/pify?keyword=bachianinha+1+pdf is part of known malicious infrastructure. Additionally, the PDF_SEO_LINK_FARM heuristic indicates a large number of external links, many pointing to Shopify domains, likely intended to obscure the malicious redirector. The document body itself is heavily obfuscated and contains the malicious redirector URL, suggesting an attempt to lure users to malicious sites.

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=bachianinha+1+pdf
    • http://files.powerlandrealty.com/uploads/1/3/1/3/131380279/posikotovosagosupu.pdf
    • http://files.champdaction.info/uploads/1/3/0/8/130813855/913a41900fb70.pdf
    • http://files.thelittlesymphony.com/uploads/1/3/2/7/132740880/kesegitowaroxap-roxegid-fekuw-famexukuvepazi.pdf
    • http://files.memoryblocks.ca/uploads/1/3/1/3/131383284/bafuromam-zumujitonesiw.pdf
    • https://cdn.shopify.com/s/files/1/0430/4211/1650/files/46591043950.pdf
    • https://cdn.shopify.com/s/files/1/0431/4179/1900/files/78245821635.pdf
    • https://cdn.shopify.com/s/files/1/0431/5650/4744/files/15769707616.pdf
    • https://cdn.shopify.com/s/files/1/0440/6480/0918/files/96079506512.pdf
    • https://cdn.shopify.com/s/files/1/0430/8313/7178/files/majewitadavisagom.pdf
    • https://cdn.shopify.com/s/files/1/0435/0928/5024/files/2786075720.pdf
    • https://cdn.shopify.com/s/files/1/0432/6470/4662/files/wisajivepalibuxom.pdf
    • https://cdn.shopify.com/s/files/1/0433/7047/9768/files/jodarogusek.pdf
    • https://cdn.shopify.com/s/files/1/0434/9755/4084/files/suboxikedudokuti.pdf
    • https://cdn.shopify.com/s/files/1/0431/6443/4589/files/dewosilomojiw.pdf
    • https://cdn.shopify.com/s/files/1/0430/8077/7882/files/13674533337.pdf
    • https://cdn.shopify.com/s/files/1/0437/4659/0872/files/four_rightly_guided_caliphs.pdf
    • https://cdn.shopify.com/s/files/1/0432/5398/9534/files/4350384518.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_off0000552a.bin
aa09dce05493b2600b8ef55e3323bde55fb26ef14c98a150432692ae40f4f053
pdf-font-stream PDF embedded font (sfnt) at offset 0x552A 5036 bytes
font_01_sfnt_off00006659.bin
eae81259a28ea74361fb174d75fe48d40f3e9cd4c2ecdcf9368a03aa46c505d8
pdf-font-stream PDF embedded font (sfnt) at offset 0x6659 10916 bytes