Malicious PDF — malware analysis report

Static analysis result for SHA-256 0506f747aac8c921…

MALICIOUS

PDF

33.9 KB Created: 2020-08-06 19:40:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b3cd4a1549a9efd527cb9d13a1685ce0 SHA-1: 213264b26160de5c5be91941268473e13a3cb5a5 SHA-256: 0506f747aac8c9215e74b7267b5a1e0905e61957628353d5bae8e71b05902d3e
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, many of which point to Shopify domains, but one critical link directs to a known malicious redirector. This suggests the document is designed to lure users into clicking through to malicious infrastructure, likely for further exploitation or phishing. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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=chemometrics+book+pdf
    • http://files.padfieldvillage.co.uk/uploads/1/3/1/4/131453034/da52e3c67175.pdf
    • http://files.lovemyhealthybeginnings.com/uploads/1/3/2/7/132740343/gaziwiviniladaj.pdf
    • http://files.mikereedpromotions.info/uploads/1/3/1/4/131406344/lijusorosituruvuli.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/welilavuruwad.pdf
    • https://cdn.shopify.com/s/files/1/0432/6404/9318/files/blood_relation_questions_for_ssc_cgl.pdf
    • https://cdn.shopify.com/s/files/1/0428/0962/2687/files/82319261354.pdf
    • https://cdn.shopify.com/s/files/1/0433/4256/1433/files/quotation_mark_symbol.pdf
    • https://cdn.shopify.com/s/files/1/0430/7818/9205/files/remikewajuk.pdf
    • https://cdn.shopify.com/s/files/1/0438/4659/8816/files/54048821824.pdf
    • https://cdn.shopify.com/s/files/1/0434/1468/3815/files/cambridge_english_proficiency_2_chomikuj.pdf
    • https://cdn.shopify.com/s/files/1/0433/7840/9639/files/xaxofuxosuw.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/49839171509.pdf
    • https://cdn.shopify.com/s/files/1/0431/0768/0405/files/vozosekakusegimup.pdf
    • https://cdn.shopify.com/s/files/1/0431/8245/7000/files/7134954501.pdf
    • https://cdn.shopify.com/s/files/1/0432/3858/8584/files/91721827268.pdf
    • https://cdn.shopify.com/s/files/1/0437/2804/4193/files/kobe_chief_keef.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000466d.bin
4fdf60ff00bcdb9e5e50881b56143d0892de9aaf41c41057fd3fd3a4248da8dd
pdf-font-stream PDF embedded font (sfnt) at offset 0x466D 5260 bytes
font_01_sfnt_off00005820.bin
0417606cad1efc135a454adf8df726a51d773aedbff38e84f2b02d8060dcc313
pdf-font-stream PDF embedded font (sfnt) at offset 0x5820 10208 bytes