Malicious PDF — malware analysis report

Static analysis result for SHA-256 b4cc9e2e8aff6d66…

MALICIOUS

PDF

62.7 KB Created: 2020-08-11 14:58:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ca68e1bfd49f7c5ea34edae5714f822a SHA-1: adc1daf9be635208f6e389078bc1b96f917a8fb2 SHA-256: b4cc9e2e8aff6d660a3b2d602ef96fb07f70227ece1e69599fc844177168ddb9
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 pointing to 'ttraff.com'. Additionally, it exhibits a PDF link farm heuristic, indicating a large number of external links, with 28 generated SEO PDF links. A low-signal heuristic for a visual download button suggests a lure. The embedded URL 'https://ttraff.com/pify?keyword=asme+bpvc+section+viii+division+1+appendix+2+pdf' is the primary indicator of malicious intent, likely serving as a redirector to a malicious payload or phishing page.

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=asme+bpvc+section+viii+division+1+appendix+2+pdf
    • http://files.metrowestsoccer.com/uploads/1/3/1/3/131380995/5314003.pdf
    • http://files.bolivarcoc.com/uploads/1/3/2/7/132710783/03a669b8.pdf
    • http://files.simply-creations.com/uploads/1/3/1/0/131070633/5195485.pdf
    • http://files.knowfallsintegration.com/uploads/1/3/0/7/130740323/zenebinizivewi.pdf
    • https://cdn.shopify.com/s/files/1/0450/4364/6614/files/methods_approaches_and_techniques_of_teaching_english.pdf
    • https://cdn.shopify.com/s/files/1/0434/6816/1176/files/73484440754.pdf
    • https://cdn.shopify.com/s/files/1/0431/6341/8784/files/39528140026.pdf
    • https://cdn.shopify.com/s/files/1/0437/7794/9848/files/detalar.pdf
    • https://cdn.shopify.com/s/files/1/0434/2887/2359/files/97086018643.pdf
    • https://cdn.shopify.com/s/files/1/0438/3119/7856/files/nifedipine_procardia_davis.pdf
    • https://cdn.shopify.com/s/files/1/0433/6926/7354/files/zizimolal.pdf
    • https://cdn.shopify.com/s/files/1/0434/3670/3900/files/wheelock_s_latin.pdf
    • https://cdn.shopify.com/s/files/1/0437/2076/9685/files/41800865510.pdf
    • https://cdn.shopify.com/s/files/1/0429/5521/0905/files/bootstrap_center_image.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000a885.bin
3c7cc5cc7a71d883f2e3edbf39cb1aeaac84bdd225253bd4a28bd68cc130f909
pdf-font-stream PDF embedded font (sfnt) at offset 0xA885 5404 bytes
font_01_sfnt_off0000bad0.bin
3f20338900d0da80933e3b790bcdf5753f7d6c91fc222041fa8be6d0457f3f01
pdf-font-stream PDF embedded font (sfnt) at offset 0xBAD0 10612 bytes
font_02_sfnt_off0000df31.bin
05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176
pdf-font-stream PDF embedded font (sfnt) at offset 0xDF31 4324 bytes