Malicious PDF — malware analysis report

Static analysis result for SHA-256 1796045e192e774b…

MALICIOUS

PDF

51.6 KB Created: 2020-08-16 17:43:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 45c195c0e081074b290ff0b20b2c6ebb SHA-1: 8efcc8dec0607f5271db42c0dcf7d2cd11b130a9 SHA-256: 1796045e192e774b1dff1ed92aae33e337ec61373e894485703fc2390b2cefc3
154 Risk Score

Malware Insights

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

The PDF contains a high number of external links, with one identified as a malicious redirector. The document body, though partially corrupted, contains a URL that mirrors the malicious redirector's target. This suggests the PDF is designed to lead users to malicious infrastructure, likely for phishing or malware delivery.

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.ru/pify?keyword=creative+thinking+questions+and+answers+pdf
    • http://razegegak.mcgilltennis.com/uploads/1/3/0/7/130776457/mowavugifofobawe.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/5943/6951/files/dozudigomumidoserike.pdf
    • https://cdn.shopify.com/s/files/1/0439/7678/6078/files/22646272496.pdf
    • https://cdn.shopify.com/s/files/1/0432/2564/5211/files/jujusovani.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/51686393220.pdf
    • https://cdn.shopify.com/s/files/1/0435/7718/0328/files/bordereau_de_paiement_cnss_et_amo.pdf
    • https://cdn.shopify.com/s/files/1/0439/4447/6840/files/land_rover_discovery_sport_2020_brochure.pdf
    • https://cdn.shopify.com/s/files/1/0429/6353/3977/files/58837875621.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/90442425312.pdf
    • https://cdn.shopify.com/s/files/1/0431/6138/7170/files/37376791672.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_off00008baa.bin
2ec1da78bee53b3bf44f1f41b487801fde4a5c7a0f4a8529601962be8356e81e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8BAA 5516 bytes
font_01_sfnt_off00009e73.bin
6e43536e12fbe1b7414c76572665fad8df413ecbd6161e51f36a2360d01c6f3d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9E73 10280 bytes

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