Malicious PDF — malware analysis report

Static analysis result for SHA-256 6db2703a87a20563…

MALICIOUS

PDF

47.6 KB Created: 2020-08-13 19:40:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 05de400e8755c31407065fea8d144a88 SHA-1: d27dc956f566b02686e995fb075102fdf760e7dd SHA-256: 6db2703a87a2056310ac553f575f2749a1080f8402d6ac6ec2f7e053c2d867f1
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.com, which is likely used to obscure the final destination of the malicious content. The document body also contains numerous links to external PDFs, suggesting a link farm or SEO poisoning attempt to drive traffic to malicious infrastructure. No scripts were extracted, but the presence of embedded URLs and the ML classifier's high confidence indicate malicious intent.

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/wb?keyword=jet%20propulsion%20pdf%20nptel
    • http://files.lakeothehills.com/uploads/1/3/0/8/130813885/d09624dfdb.pdf
    • http://libon.sunrawhealingdesserts.com/uploads/1/3/1/0/131070867/mivomipanigudelarave.pdf
    • http://files.givingandreceivinginhealthcare.com/uploads/1/3/1/4/131406082/meganis-bozuwenikifik-safuvagawalona.pdf
    • http://files.waldensamkite.com/uploads/1/3/1/4/131438759/3018119.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/3081/4626/files/neuralgia_del_trigemino_diagnostico.pdf
    • https://cdn.shopify.com/s/files/1/0433/9472/8103/files/arabic_to_english_meaning.pdf
    • https://cdn.shopify.com/s/files/1/0431/2439/2087/files/guwikotomidalirasu.pdf
    • https://cdn.shopify.com/s/files/1/0433/6356/5727/files/23900725091.pdf
    • https://cdn.shopify.com/s/files/1/0431/4690/3701/files/46476811673.pdf
    • https://cdn.shopify.com/s/files/1/0437/1808/2709/files/losaredevapewiwumujutor.pdf
    • https://cdn.shopify.com/s/files/1/0432/8026/9477/files/fuxadebub.pdf
    • https://cdn.shopify.com/s/files/1/0430/3503/3757/files/ronibezupugavakise.pdf
    • https://cdn.shopify.com/s/files/1/0432/1063/7476/files/vivotipamabejesipem.pdf
    • https://cdn.shopify.com/s/files/1/0431/5149/1233/files/fatajekemewudibolamabujuv.pdf
    • https://cdn.shopify.com/s/files/1/0435/7832/7199/files/49075899056.pdf
    • https://cdn.shopify.com/s/files/1/0427/5830/8006/files/12228489920.pdf
    • https://cdn.shopify.com/s/files/1/0427/6181/4172/files/intel_8086_assembly_language_programming.pdf
    • https://cdn.shopify.com/s/files/1/0438/0013/3793/files/lepebitevalaz.pdf
    • https://cdn.shopify.com/s/files/1/0437/1139/8041/files/2447031353.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006143.bin
b0f5fcde855ce333c63463bd0f236927219cae22c54a15cc76e011bbe7bcce3b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6143 4816 bytes
font_01_sfnt_off000071b4.bin
439871e8418868d6155ef89f0740b174aa949e170978ae3e4c619091a774d5c2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x71B4 11076 bytes
font_02_sfnt_off0000972f.bin
611421e007f1eea5121b73ca6ad559e82524a2a2d23023d032b6806d1b85ca98		 pdf-font-stream PDF embedded font (sfnt) at offset 0x972F 17532 bytes

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