Malicious PDF — malware analysis report

Static analysis result for SHA-256 d8d2039a31891196…

MALICIOUS

PDF

54.3 KB Created: 2020-08-08 01:32:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0eccfb399bea6cc17a25f083a5813902 SHA-1: f498a39450ac488203bfe7f7975a79507f5d9cf0 SHA-256: d8d2039a3189119688bc8b85750d77707527e02aa8bd49495c31503485b34aea
152 Risk Score

Malware Insights

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

The PDF contains numerous links, including one to a known malicious redirector, ttraff.com. The document body, though partially corrupted, contains text related to 'Water supply and sanitary engineering pdf free download' and the malicious URL, suggesting a lure to download malicious content. The ML classifier 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.com/pify?keyword=water+supply+and+sanitary+engineering+pdf+free+download
    • http://files.deespassionateworld.com/uploads/1/3/0/7/130739059/8798861.pdf
    • http://kitizovi.craniosacralnashville.com/uploads/1/3/1/4/131406082/5907262.pdf
    • http://dupisaw.offcentervt.com/uploads/1/3/1/4/131483337/mapegozuganaxef.pdf
    • http://files.polished-professionals.com/uploads/1/3/2/6/132681409/novejukaj.pdf
    • http://files.fgfvegan.com/uploads/1/3/1/3/131381414/66b1a3377c888f2.pdf
    • https://cdn.shopify.com/s/files/1/0431/1583/9645/files/38020507904.pdf
    • https://cdn.shopify.com/s/files/1/0433/4937/7174/files/data_envelopment_analysis_tutorial.pdf
    • https://cdn.shopify.com/s/files/1/0430/7157/0069/files/73117432857.pdf
    • https://cdn.shopify.com/s/files/1/0434/8038/3653/files/fijaresu.pdf
    • https://cdn.shopify.com/s/files/1/0434/1425/7815/files/vesusaluwanufodulube.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/34292265756.pdf
    • https://cdn.shopify.com/s/files/1/0434/2395/7144/files/48929831369.pdf
    • https://cdn.shopify.com/s/files/1/0435/3556/4949/files/architecture_design_in_software_engineering.pdf
    • https://cdn.shopify.com/s/files/1/0428/2191/0687/files/73013639530.pdf
    • https://cdn.shopify.com/s/files/1/0429/0124/2022/files/mevujofetak.pdf
    • https://cdn.shopify.com/s/files/1/0432/2174/5822/files/super_mario_64_wad_download.pdf
    • https://cdn.shopify.com/s/files/1/0430/4486/4149/files/monebipojuximababowolow.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008092.bin
71096c4062bbec1e4dfa4950bf3abcb58a432615792ae787e3e9b3397eb27fbe		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8092 5416 bytes
font_01_sfnt_off00009328.bin
33d80b5e357abfa3ea91f5eff18928953f8e36d8e9a7aea158c838e8ae756dd9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9328 2116 bytes
font_02_sfnt_off00009cf2.bin
98efd1ad90ac19c5f845c37b301babdf5633ecf3d785b1abe12d92d6195d788b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9CF2 14868 bytes

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