Malicious PDF — malware analysis report

Static analysis result for SHA-256 a60847f8daf599df…

MALICIOUS

PDF

42.4 KB Created: 2020-08-16 17:30:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 08d1f2682f01e8ffab0274dabfd3bf6b SHA-1: a2f56ec1fae5dd252e04598f8ef61802764b4745 SHA-256: a60847f8daf599df99649983133711a9d6516f50e63f70e7e9702add809f818f
152 Risk Score

Malware Insights

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

The PDF was flagged as malicious by a machine learning classifier and contains a large number of embedded links, many of which point to a known malicious redirector. The document body contains the URL 'https://ttraff.ru/pify?keyword=banjara+thali+bhajan', which is also listed as a malicious redirector. The presence of numerous links suggests an attempt to manipulate search engine results or to lead users to malicious content.

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=banjara+thali+bhajan
    • http://files.amaddoodler.com/uploads/1/3/0/7/130774965/milobolag.pdf
    • http://files.jept.co.nz/uploads/1/3/1/3/131380627/rixeranojuxikaveko.pdf
    • http://files.rjgrayecology.com/uploads/1/3/2/6/132683154/492346.pdf
    • https://cdn.shopify.com/s/files/1/0448/0958/4802/files/brahms_hungarian_dance_piano_sheet_music.pdf
    • https://cdn.shopify.com/s/files/1/0433/6805/4940/files/swbf2_conversion_pack.pdf
    • https://cdn.shopify.com/s/files/1/0435/0250/2054/files/pearson_mastering_physics_solutions_manual.pdf
    • https://cdn.shopify.com/s/files/1/0431/1613/4562/files/bcs_book_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0430/1645/4305/files/votazin.pdf
    • https://cdn.shopify.com/s/files/1/0434/5082/6905/files/8882596516.pdf
    • https://cdn.shopify.com/s/files/1/0447/3107/2666/files/metabolic_acidosis.pdf
    • https://cdn.shopify.com/s/files/1/0428/2135/3635/files/zujiruvedov.pdf
    • https://cdn.shopify.com/s/files/1/0430/4705/9607/files/gray_s_anatomy_review_book.pdf
    • https://cdn.shopify.com/s/files/1/0431/2052/5469/files/46266688325.pdf
    • https://cdn.shopify.com/s/files/1/0437/0350/0950/files/teach_yourself_java_in_24_hours.pdf
    • https://cdn.shopify.com/s/files/1/0441/2522/5112/files/pejivadotuloxiduvumabata.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004b05.bin
424be3f68862b6b3627fdd0ed07365c40579a1308ae603d3107355f1a0b1b5e6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4B05 4860 bytes
font_01_sfnt_off00005b73.bin
d2d10b6b0c668cf26faa9347c7054f8580c7eefa5cb7aecda2a4fba74bd025f0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5B73 6068 bytes
font_02_sfnt_off00006b23.bin
eed9a5baed5f243ae98b67e5e004822b821cf8d32d8f72a8c63709be11b39ccc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6B23 9824 bytes
font_03_sfnt_off00008cf8.bin
af1d0935af380230252fe0d0336b0090d9d2cf0742c361a64a9be788e434adb9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8CF8 3568 bytes

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