Malicious PDF — malware analysis report

Static analysis result for SHA-256 cf82b386db8a8e19…

MALICIOUS

PDF

47.4 KB Created: 2020-08-07 04:21:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6810b57289e4e1b1788aa8beb0e30be0 SHA-1: 5f2af20af004f5a49387939283ac60efd9ebc2a7 SHA-256: cf82b386db8a8e192b786ce0198523a93550519fc420f8eb4c1b5b68f0f85f1c
128 Risk Score

Malware Insights

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

The PDF contains embedded links, one of which, https://ttraff.com/pify?keyword=sales+agent+agreement+pdf, is identified as a malicious redirector. The document body, though heavily obfuscated, contains text related to a 'sales agent agreement', suggesting a lure to trick the user into clicking the malicious link. The presence of a link farm further supports a malicious intent to drive traffic to potentially harmful sites.

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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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=sales+agent+agreement+pdf
    • http://files.nympa.com/uploads/1/3/2/7/132710671/jinosonas-lepetiduvazika-tolibopojul.pdf
    • http://files.ccrcdogs.com/uploads/1/3/2/6/132681281/fenuxeji.pdf
    • http://files.richmumley.info/uploads/1/3/0/7/130739697/e0c2d5b4d25.pdf
    • https://cdn.shopify
    • https://cdn.shopify.com/s/files/1/0433/1978/7675/files/31825642447.pdf
    • https://cdn.shopify.com/s/files/1/0437/7139/6257/files/83809400350.pdf
    • https://cdn.shopify.com/s/files/1/0430/0134/8255/files/bizesuvotom.pdf
    • https://cdn.shopify.com/s/files/1/0435/5473/4235/files/engineering_graphics_with_autocad_2014.pdf
    • https://cdn.shopify.com/s/files/1/0432/4235/6904/files/67508319200.pdf
    • https://cdn.shopify.com/s/files/1/0436/0631/1070/files/zupinagoran.pdf
    • https://cdn.shopify.com/s/files/1/0432/2338/4219/files/vikudasu.pdf
    • https://cdn.shopify.com/s/files/1/0431/1767/4656/files/speaking_english_file.pdf
    • https://cdn.shopify.com/s/files/1/0431/5702/9019/files/xosigifivet.pdf
    • https://cdn.shopify.com/s/files/1/0435/5732/2903/files/maple_hunter_decals.pdf
    • https://cdn.shopify.com/s/files/1/0427/5562/1031/files/64112206080.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/77363931764.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/pegofegomena.pdf
    • https://cdn.shopify.com/s/files/1/0428/8462/8633/files/35830536333.pdf
    • https://cdn.shopify.com/s/files/1/0431/3127/3370/files/abyssal_tentacle_gungeon.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_off00007bbf.bin
e6ff851b964dfc4631b96bc3ff3646cebcbcc4c33d9a4cd4446738e957fae63f
pdf-font-stream PDF embedded font (sfnt) at offset 0x7BBF 5464 bytes
font_01_sfnt_off00008e3a.bin
28c95b6031b9ad3718defdd7ff8d17fa0edbde371a933434a0c40aa0df76f56c
pdf-font-stream PDF embedded font (sfnt) at offset 0x8E3A 10008 bytes