Malicious PDF — malware analysis report

Static analysis result for SHA-256 d727389ecdb17568…

MALICIOUS

PDF

41.8 KB Created: 2020-08-11 21:45:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fe2e9b74a843ece2708cd2829daacd10 SHA-1: 7e7f00dfbda0bcd79702509d129d23d503586f29 SHA-256: d727389ecdb17568fd31dce21bbe1b71887e5518bfc8d23f79d1f436dffbdd51
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a mass of external links, many of which point to a link farm hosted on Shopify. One of these links, disguised as an admission form, redirects to a known malicious redirector. The document body, though heavily obfuscated, contains the string 'Rscit admission form pdf' and the malicious URL, indicating a lure to a malicious site. No scripts were extracted, but the PDF structure and embedded links strongly suggest a phishing or redirection attempt.

Heuristics 3

  • 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.
  • 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=rscit+admission+form+pdf
    • http://files.jagregina.com/uploads/1/3/0/9/130969322/dafewurexebed-xonumonade-danuzotituvu.pdf
    • http://files.lakewoodinstituteoftheatre.org/uploads/1/3/1/1/131164180/bujodovamapisa.pdf
    • http://files.hotairmarketing.com/uploads/1/3/1/4/131406258/a0f24b53727c.pdf
    • http://files.oldcigarwarehouse.com/uploads/1/3/1/6/131606803/5432894.pdf
    • https://cdn.shopify.com/s/files/1/0428/8207/2743/files/kumazun.pdf
    • https://cdn.shopify.com/s/files/1/0433/6048/5541/files/mathematics_for_economists_norton_1994.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/17721531589.pdf
    • https://cdn.shopify.com/s/files/1/0437/3679/3237/files/tutorial_archicad_21_espaol.pdf
    • https://cdn.shopify.com/s/files/1/0435/6653/0719/files/effects_of_alcohol_on_pregnancy.pdf
    • https://cdn.shopify.com/s/files/1/0433/5036/0232/files/dekufivifedopiluvewapam.pdf
    • https://cdn.shopify.com/s/files/1/0431/1154/7036/files/rofobamiremefizaze.pdf
    • https://cdn.shopify.com/s/files/1/0431/9127/1586/files/79595038412.pdf
    • https://cdn.shopify.com/s/files/1/0431/2979/8807/files/valve_amplifiers_fourth_edition.pdf
    • https://cdn.shopify.com/s/files/1/0427/7361/0663/files/12813968273.pdf
    • https://cdn.shopify.com/s/files/1/0432/2823/3883/files/nbme_cbse_remembered_questions_full.pdf
    • https://cdn.shopify.com/s/files/1/0430/2834/9085/files/97503271655.pdf
    • https://cdn.shopify.com/s/files/1/0431/0827/0244/files/tetixesovizopigavug.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/zenafepejeviwasi.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_off00006635.bin
610d10ad8ba98083f38d03f44a315cf35edd84a4c14fd4c0fcd4a23c973e6fd5
pdf-font-stream PDF embedded font (sfnt) at offset 0x6635 5276 bytes
font_01_sfnt_off00007808.bin
448d62ebc44ac97dcc7ba8c8f8fd37a6f83d021c71cf7ced12c3a5bc746e915f
pdf-font-stream PDF embedded font (sfnt) at offset 0x7808 9964 bytes