Malicious PDF — malware analysis report

Static analysis result for SHA-256 7afc651a0c99acc3…

MALICIOUS

PDF

34.0 KB Created: 2020-08-21 12:19:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 286bb72112ccf4c9720f8420c363b0cf SHA-1: 49f5d2d6610b6ae332b674138b0300a8ecd43d27 SHA-256: 7afc651a0c99acc350531733b7e8698c57761af44eac3d40d21c66ba3ed2be29
154 Risk Score

Malware Insights

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

The PDF contains a link that redirects to malicious infrastructure, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body and embedded link structure suggest a lure to download further content, likely malicious. The ML classifier also strongly flagged this PDF as malicious.

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=yassarnal+quran+ahmadiyya+pdf
    • http://datofiw.myplaycafe.com/uploads/1/3/1/1/131164250/435f31ca4f70ced.pdf
    • http://files.aikenfbcpreschool.org/uploads/1/3/1/3/131380729/7cf9b9b2.pdf
    • http://xerewuzaf.mysterymansionregina.ca/uploads/1/3/2/6/132695278/bonenimu.pdf
    • http://files.artbymkd.com/uploads/1/3/1/3/131379680/pizexoradinatowafum.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/9051/7911/files/fajetupinabegi.pdf
    • https://cdn.shopify.com/s/files/1/0429/6612/2662/files/88611346728.pdf
    • https://cdn.shopify.com/s/files/1/0435/5493/0839/files/brandon_grotesque_medium_free.pdf
    • https://cdn.shopify.com/s/files/1/0429/2853/7753/files/hip_replacement_rehab_protocol.pdf
    • https://cdn.shopify.com/s/files/1/0431/0974/4789/files/lixagufejazejewarenu.pdf
    • https://cdn.shopify.com/s/files/1/0429/4865/7318/files/36039430972.pdf
    • https://cdn.shopify.com/s/files/1/0439/6836/4702/files/funciones_de_los_organelos_celulares.pdf
    • https://cdn.shopify.com/s/files/1/0428/4134/2108/files/omron_blood_pressure_monitor_manual_bp652.pdf
    • https://cdn.shopify.com/s/files/1/0430/2641/5779/files/sumeruxot.pdf
    • https://cdn.shopify.com/s/files/1/0429/3656/5923/files/appendix_2_form.pdf
    • https://cdn.shopify.com/s/files/1/0431/1721/5905/files/duzivikoxu.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_off000046c5.bin
9bab11625249ecf608c6be1c876dabe5fb8ce688c0c78d9da670986eaf5beb30
pdf-font-stream PDF embedded font (sfnt) at offset 0x46C5 5468 bytes
font_01_sfnt_off00005932.bin
3d960c05cdb67e7f70b77bb21cfd360e3f8774b832f7b09c79f95b17be4b7147
pdf-font-stream PDF embedded font (sfnt) at offset 0x5932 9716 bytes