Malicious PDF — malware analysis report

Static analysis result for SHA-256 22931b1cec186597…

MALICIOUS

PDF

41.0 KB Created: 2020-08-02 12:29:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c8187c98dc96574239dcbc7bc7b523df SHA-1: 67927dca92c2253ae188e2ebeb503e57c083ea48 SHA-256: 22931b1cec186597f49c911afbbce23fcf42b2a85ef8819dbd57d8b0535c6df0
128 Risk Score

Malware Insights

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

The PDF contains a mass external link farm, with one link pointing to a known malicious redirector. The document body, though heavily obfuscated, contains a URL that appears to be the same as the malicious redirector. The presence of a 'download' button lure further supports a malicious intent to redirect the user to harmful content.

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.com/pify?keyword=shapes+in+gimp
    • http://files.droolwool.com/uploads/1/3/1/4/131437725/8566107.pdf
    • http://files.qb4ply.com/uploads/1/3/1/0/131069950/6217961.pdf
    • http://files.xjrichert.com/uploads/1/3/0/7/130740124/suxajojakimemu_dagigosaji_kozapudula_tugezuxajiju.pdf
    • http://files.willowfree.ca/uploads/1/3/0/7/130740344/xiwodufa.pdf
    • https://cdn.shopify.com/s/files/1/0440/2728/1558/files/get_element_by_id_in_view_port.pdf
    • https://cdn.shopify.com/s/files/1/0437/7316/5725/files/gupigetatamufizefimutu.pdf
    • https://cdn.shopify.com/s/files/1/0439/7400/0798/files/rabifarawazam.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/8833338052.pdf
    • https://cdn.shopify.com/s/files/1/0434/8674/0646/files/vatudujopakeminuf.pdf
    • https://cdn.shopify.com/s/files/1/0438/9945/3608/files/wexonagisalarireboxesunu.pdf
    • https://cdn.shopify.com/s/files/1/0435/9585/8083/files/muzarixoxivuba.pdf
    • https://cdn.shopify.com/s/files/1/0438/6367/0939/files/96767419140.pdf
    • https://cdn.shopify.com/s/files/1/0431/3687/6695/files/15909846023.pdf
    • https://cdn.shopify.com/s/files/1/0427/7154/6279/files/mirexeruvagujumefeza.pdf
    • https://cdn.shopify.com/s/files/1/0440/7279/6310/files/xadebuzozoxizejex.pdf
    • https://cdn.shopify.com/s/files/1/0431/5889/6802/files/nirigal.pdf
    • https://cdn.shopify.com/s/files/1/0437/6500/6494/files/12128534359.pdf
    • https://cdn.shopify.com/s/files/1/0431/1993/5655/files/gatixosulevadigozila.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_off0000642f.bin
709d584dd35b847b3b9c811a18c209f75061ebcffaf711f690c580c3af3cec89
pdf-font-stream PDF embedded font (sfnt) at offset 0x642F 5208 bytes
font_01_sfnt_off000075c5.bin
7a52fbbab2d41ebd9dcf16cd881b4d7ae339067adc7078a92dbb9198fdf061f5
pdf-font-stream PDF embedded font (sfnt) at offset 0x75C5 9808 bytes