Malicious PDF — malware analysis report

Static analysis result for SHA-256 ab220f45bc974f1a…

MALICIOUS

PDF

49.5 KB Created: 2020-08-05 15:17:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f08a2eda3b6dd811eb650d48aef226d3 SHA-1: dfec761a8c927bd53bb0c7620d224d57c8b11216 SHA-256: ab220f45bc974f1a6d1e48586e594419678eca0b77fda7ab779418dab4b2c975
152 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic firing for a malicious redirector. The document body, though heavily obfuscated, contains a URL that matches the redirector found in the heuristics. This indicates the primary goal is to redirect the user to a malicious site, likely for further exploitation or credential harvesting.

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=marathi+kadambari+pdf+file
    • http://files.geras.sk/uploads/1/3/1/4/131453595/ropaboxeralevaj.pdf
    • http://files.ameritexmovers.com/uploads/1/3/1/3/131383743/wugevadizatolagiravi.pdf
    • http://files.perfectionsdetail.com/uploads/1/3/0/7/130739628/tarufipowox.pdf
    • http://golusek.bewellbrookfield.com/uploads/1/3/2/6/132682787/7413268.pdf
    • http://files.4seasonsglobal.com/uploads/1/3/2/6/132681632/106c32b62a6.pdf
    • https://cdn.shopify.com/s/files/1/0440/8298/7173/files/shunting_yard_algorithm.pdf
    • https://cdn.shopify.com/s/files/1/0439/2475/0491/files/rusatufuxakesikixit.pdf
    • https://cdn.shopify.com/s/files/1/0434/4987/6630/files/88667310535.pdf
    • https://cdn.shopify.com/s/files/1/0430/7917/2257/files/82413980923.pdf
    • https://cdn.shopify.com/s/files/1/0432/3000/3358/files/godsfall_world_book.pdf
    • https://cdn.shopify.com/s/files/1/0435/8209/5517/files/d3_js_heat_map.pdf
    • https://cdn.shopify.com/s/files/1/0433/1690/4104/files/1311883795.pdf
    • https://cdn.shopify.com/s/files/1/0428/2561/3468/files/rinawutowu.pdf
    • https://cdn.shopify.com/s/files/1/0437/5927/2090/files/midololikonapitot.pdf
    • https://cdn.shopify.com/s/files/1/0435/1436/4059/files/xipelufabujelekekixini.pdf
    • https://cdn.shopify.com/s/files/1/0434/3637/6231/files/52537072974.pdf
    • https://cdn.shopify.com/s/files/1/0440/5755/9190/files/17629522087.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_off000082cb.bin
5805d38f8769ce53b30ab872b80e57ca3d3191d9e11cc19fbeb88e5c8341d4b4
pdf-font-stream PDF embedded font (sfnt) at offset 0x82CB 5312 bytes
font_01_sfnt_off000094b7.bin
1f661dbf4a816ea90d2d966d8ba6d1f620dbc7647bc31a9530482599ca8e73d1
pdf-font-stream PDF embedded font (sfnt) at offset 0x94B7 10596 bytes