Malicious PDF — malware analysis report

Static analysis result for SHA-256 fb32d8b88448e996…

MALICIOUS

PDF

43.5 KB Created: 2020-08-06 10:32:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7afda4aad1de5129269a8cbf4ca23308 SHA-1: 33a0911d0ed3b33d96287caa9eefc837e7212ddd SHA-256: fb32d8b88448e9963fb62161be1c7877f88b82e4f51cdf13448250656f4b0ff3
128 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.cc/pify?keyword=convert+pdf+into+word+document+online'. This URL is designed to obscure the true destination and likely serves as a lure. The presence of a 'download button' heuristic further supports the idea that the document is attempting to trick the user into clicking the malicious link. The document body also contains numerous embedded URLs, many of which point to benign Shopify domains, but the primary malicious redirector is the key indicator.

Heuristics 4

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=convert+pdf+into+word+document+online
    • http://malujafo.stuffrobpaints.com/uploads/1/3/1/6/131637257/986135.pdf
    • http://files.elijahschallenge.com/uploads/1/3/0/7/130739116/2674150.pdf
    • http://files.themostunlikelyplace.com/uploads/1/3/1/8/131871740/d9ab3499292b2d.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/kufotiniponekurek.pdf
    • https://cdn.shopify.com/s/files/1/0431/5496/4631/files/53897748578.pdf
    • https://cdn.shopify.com/s/files/1/0440/3052/5590/files/gomugudebogafutiwesosa.pdf
    • https://cdn.shopify.com/s/files/1/0427/9074/8316/files/94768864977.pdf
    • https://cdn.shopify.com/s/files/1/0428/4959/9651/files/muzugujomokefusake.pdf
    • https://cdn.shopify.com/s/files/1/0431/6584/3620/files/fulajukomogexuvafet.pdf
    • https://cdn.shopify.com/s/files/1/0433/4934/4421/files/mapimenodatupoka.pdf
    • https://cdn.shopify.com/s/files/1/0450/6501/1352/files/cardiomyopathie_dilate_2020.pdf
    • https://cdn.shopify.com/s/files/1/0435/6187/7665/files/ponidadajomojerazabunojal.pdf
    • https://cdn.shopify.com/s/files/1/0432/2990/5058/files/tutomevabigexarujojixu.pdf
    • https://cdn.shopify.com/s/files/1/0428/2541/6860/files/liwizafisevex.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_off00006cb3.bin
9420c818005b7fe8c2d9fa18a5b48b06eace5b42146e0dbb138e5c9e6f726620
pdf-font-stream PDF embedded font (sfnt) at offset 0x6CB3 4972 bytes
font_01_sfnt_off00007da1.bin
a4342d807dabd613c4ac9317e9accbce6be0833c86d0c6c75f44c34648f168f6
pdf-font-stream PDF embedded font (sfnt) at offset 0x7DA1 10476 bytes