Malicious PDF — malware analysis report

Static analysis result for SHA-256 e2dcb6cb97bb01ac…

MALICIOUS

PDF

43.0 KB Created: 2020-08-12 22:06:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3bc3c44d5b291294623cea3fce1ba22d SHA-1: 5a6e6ab3454236e6e00dbfddeaa5585e223a70fa SHA-256: e2dcb6cb97bb01ac2444ee4b930ce455e2bc2f1256ba855e0b73334a79062a87
128 Risk Score

Malware Insights

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

The PDF file contains multiple embedded links, with one specifically pointing to a known malicious redirector. The document body, though heavily obfuscated, contains text related to 'medial epicondylitis treatment pdf' and the malicious URL, suggesting a lure to a malicious site. The presence of a large number of external PDF links also indicates a link farm, likely for SEO poisoning or to obscure the final malicious destination.

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.ru/pify?keyword=medial+epicondylitis+treatment+pdf
    • http://files.thecarolinastrut.com/uploads/1/3/1/4/131453302/weluv-nofizibet.pdf
    • http://files.wildlifepestsolutions.com/uploads/1/3/1/3/131384175/99c5058eac8.pdf
    • http://files.highquest.info/uploads/1/3/1/4/131410479/2222988.pdf
    • https://cdn.shopify.com/s/files/1/0428/6346/0508/files/5000_watts_power_amplifier_circuit_diagram.pdf
    • https://cdn.shopify.com/s/files/1/0437/1572/3414/files/duzadek.pdf
    • https://cdn.shopify.com/s/files/1/0432/2502/2621/files/vejunatakixonililo.pdf
    • https://cdn.shopify.com/s/files/1/0434/2143/4005/files/livro_candidiase_tem_cura_gratis.pdf
    • https://cdn.shopify.com/s/files/1/0432/5274/4356/files/project_etal_download.pdf
    • https://cdn.shopify.com/s/files/1/0431/0014/3777/files/liberalismo_mexicano_contemporaneo.pdf
    • https://cdn.shopify.com/s/files/1/0427/9740/0223/files/watch_sherlock_online_free.pdf
    • https://cdn.shopify.com/s/files/1/0428/5674/3079/files/13546624489.pdf
    • https://cdn.shopify.com/s/files/1/0431/4447/8874/files/12758527854.pdf
    • https://cdn.shopify.com/s/files/1/0430/0632/8985/files/fiwejitu.pdf
    • https://cdn.shopify.com/s/files/1/0449/0670/9159/files/boorstin_kelley_a_history_of_the_united_states.pdf
    • https://cdn.shopify.com/s/files/1/0431/8799/4792/files/25509588789.pdf
    • https://cdn.shopify.com/s/files/1/0428/1607/7991/files/4868769886.pdf
    • https://cdn.shopify.com/s/files/1/0431/6954/6396/files/dazakoduguxemelewukaroru.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_off000068e9.bin
54b36375d97e3af5dfadb0a0eeed4e2b8e87fadbbb9cb36418f7ecfa7c645af9
pdf-font-stream PDF embedded font (sfnt) at offset 0x68E9 5408 bytes
font_01_sfnt_off00007b3b.bin
def327b81d60cb8be2a06dd7321ef7e41c9e054cec7489517f0480681cd1d7a3
pdf-font-stream PDF embedded font (sfnt) at offset 0x7B3B 10540 bytes