Malicious PDF — malware analysis report

Static analysis result for SHA-256 0512f4753bba8541…

MALICIOUS

PDF

59.7 KB Created: 2020-08-03 16:20:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5a8ebc27611e05517af29f579ed5728a SHA-1: 63ca1078d7df219df0856a7cda8d0951d7505d49 SHA-256: 0512f4753bba8541c55ec66d7ebd31f25af53ae8d9f4784e1325410cf5d450b4
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a link to a known malicious redirector, ttraff.com, which is disguised as a pharmacology PDF. The ML classifier strongly flagged this PDF as malicious, and the presence of a link farm further indicates malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to redirect users to malicious content.

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.com/pify?keyword=antiepileptic+drugs+pharmacology+pdf
    • http://files.restaurantlegacysolutions.com/uploads/1/3/2/7/132710683/2535869.pdf
    • http://files.xfleettrucks.com/uploads/1/3/2/7/132740285/bewuwavotovigekajuw.pdf
    • http://files.heronmediagroup.com/uploads/1/3/1/6/131637853/9791184.pdf
    • http://files.rgpettit.com/uploads/1/3/1/1/131163684/6f3c4d89.pdf
    • http://files.jmontanaphotography.com/uploads/1/3/0/9/130969356/furimofagope-wuluw-zosetowatufupi.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/tekutuni.pdf
    • https://cdn.shopify.com/s/files/1/0433/7152/8344/files/pegolibipuxa.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/9590150980.pdf
    • https://cdn.shopify.com/s/files/1/0429/9508/9559/files/tapitixomotofudexatavitog.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/punafaga.pdf
    • https://cdn.shopify.com/s/files/1/0429/8460/3801/files/12183599430.pdf
    • https://cdn.shopify.com/s/files/1/0435/3651/5224/files/lajetalupe.pdf
    • https://cdn.shopify.com/s/files/1/0429/6281/3084/files/kefadedexolubevadiwoguf.pdf
    • https://cdn.shopify.com/s/files/1/0428/9354/1535/files/gimonodojumubogudozax.pdf
    • https://cdn.shopify.com/s/files/1/0429/7634/6266/files/70842254358.pdf
    • https://cdn.shopify.com/s/files/1/0439/4103/6200/files/react_native_touchablehighlight.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_off0000ab1f.bin
e05bb05721b0a3d117adb333a5a9ec89edbdd8754c19e95c11ae0e0300645963
pdf-font-stream PDF embedded font (sfnt) at offset 0xAB1F 5660 bytes
font_01_sfnt_off0000be45.bin
0bb2e38801d7e698ed9251c5b520ab03683a744a739a21e37285ea381c6fd122
pdf-font-stream PDF embedded font (sfnt) at offset 0xBE45 10292 bytes