Malicious PDF — malware analysis report

Static analysis result for SHA-256 58c511a8d4f8d10a…

MALICIOUS

PDF

40.7 KB Created: 2020-08-25 02:43:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3eda9a6bae323430926aa1ae4ea9699c SHA-1: 73bb2cb4be83731861598e98fcfac9b139672f3b SHA-256: 58c511a8d4f8d10ac772d84d5e02b8a1982e88ed7c709c463813cbf4cbd88f15
128 Risk Score

Malware Insights

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

The PDF contains multiple heuristics indicating malicious intent, including a link to a known malicious redirector and a large number of external PDF links, suggesting a link farm for SEO manipulation. The presence of a 'download button' lure further supports a phishing or redirection attack. The primary malicious URL identified is https://ttraff.cc/pify?keyword=model+of+experience+certificate+pdf, which is used to redirect the user.

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=model+of+experience+certificate+pdf
    • http://files.hollysmithsj.com/uploads/1/3/1/4/131453636/goduzonowoguzinex.pdf
    • http://files.mattlmiller.com/uploads/1/3/0/8/130814050/pubagefu.pdf
    • http://files.colesworldofmathematics.com/uploads/1/3/1/3/131381901/ravatetunug-lojiko.pdf
    • http://files.8foodallergensfreedelicious.com/uploads/1/3/1/3/131379246/dizodave.pdf
    • https://cdn.shopify.com/s/files/1/0431/3281/3473/files/zip_codes_in_usa.pdf
    • https://cdn.shopify.com/s/files/1/0432/7895/8758/files/94612687010.pdf
    • https://cdn.shopify.com/s/files/1/0427/9474/6023/files/62055654417.pdf
    • https://cdn.shopify.com/s/files/1/0448/1197/6855/files/operatoria_dental_barrancos_mooney.pdf
    • https://cdn.shopify.com/s/files/1/0430/1471/7597/files/ben_roethlisberger_net_worth.pdf
    • https://cdn.shopify.com/s/files/1/0434/7278/1477/files/html5_cheat_sheet_2018.pdf
    • https://cdn.shopify.com/s/files/1/0434/7107/7526/files/alter_ego_a1_gratis.pdf
    • https://cdn.shopify.com/s/files/1/0433/7834/4097/files/cessna_421_checklist.pdf
    • https://cdn.shopify.com/s/files/1/0459/2287/7607/files/zener_diode_characteristics_lab_report.pdf
    • https://cdn.shopify.com/s/files/1/0431/2878/3002/files/75522544751.pdf
    • https://cdn.shopify.com/s/files/1/0440/0916/0862/files/penifi.pdf
    • https://cdn.shopify.com/s/files/1/0431/3815/4657/files/29391773716.pdf
    • https://cdn.shopify.com/s/files/1/0438/5678/9664/files/43959221319.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_off0000624a.bin
1630e48a2f9567494a32497a6156cb68caae863213a8d7d596af6421fd78db48
pdf-font-stream PDF embedded font (sfnt) at offset 0x624A 5044 bytes
font_01_sfnt_off0000738d.bin
190b0df1b37f41c5985781d5577d6ff1ea647ffb51ac133bf3e6676042e20066
pdf-font-stream PDF embedded font (sfnt) at offset 0x738D 9968 bytes