Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e12c31a634b595d…

MALICIOUS

PDF

33.6 KB Created: 2020-08-07 09:33:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: faa464ccfa270a2fb511a3b612912a2f SHA-1: 1c25489dbb4482842ef497e1e12a603d7c4b7548 SHA-256: 2e12c31a634b595d202fe7ef7561af8739dcd391d20ac7cc28e86cc48ee2032a
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a mass of external links, including one pointing to a known malicious redirector at `https://ttraff.com/pify?keyword=nearpod+manual+pdf`. The document body, though heavily obfuscated, contains text related to 'Nearpod manual pdf', suggesting a lure to trick users into clicking the malicious link. The ML classifier strongly supports the malicious verdict.

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=nearpod+manual+pdf
    • http://files.rogersmechanicalinc.com/uploads/1/3/0/8/130813516/nutisoren-tobafuzibijew-lupak.pdf
    • http://files.hijackingfieldtrips.com/uploads/1/3/2/7/132740564/gimobuf.pdf
    • http://files.thebigbarmitzvah.com/uploads/1/3/1/8/131871597/vilarobolobaku-vuxawavavuwef.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/nagexonulelaxefirulilona.pdf
    • https://cdn.shopify.com/s/files/1/0435/5653/6479/files/mixeluwiwamipa.pdf
    • https://cdn.shopify.com/s/files/1/0429/6350/1222/files/mangastream_is_gone.pdf
    • https://cdn.shopify.com/s/files/1/0438/3748/9309/files/demilijanimuzoj.pdf
    • https://cdn.shopify.com/s/files/1/0435/3071/5288/files/62034118798.pdf
    • https://cdn.shopify.com/s/files/1/0433/7339/6133/files/befarijefavudo.pdf
    • https://cdn.shopify.com/s/files/1/0432/2738/1920/files/zefasuliji.pdf
    • https://cdn.shopify.com/s/files/1/0433/7595/2030/files/7926390773.pdf
    • https://cdn.shopify.com/s/files/1/0432/1856/7335/files/final_acceptance_certificate.pdf
    • https://cdn.shopify.com/s/files/1/0429/5573/5193/files/vaxuralivipi.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/ruwisosipopiwusanitilowaz.pdf
    • https://cdn.shopify.com/s/files/1/0431/6200/9755/files/suvopubefavazib.pdf
    • https://cdn.shopify.com/s/files/1/0435/2465/3224/files/332086006.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_off000048ec.bin
aafa76affbf6f89304317cc6cb99c04505bd383ce73f48b1ffe09b1a8c1333cc
pdf-font-stream PDF embedded font (sfnt) at offset 0x48EC 4976 bytes
font_01_sfnt_off000059c8.bin
bae3911f6ecbe746a653999ab34914be2cf5803ef79d8d8b381e6d73c9ee289d
pdf-font-stream PDF embedded font (sfnt) at offset 0x59C8 9500 bytes