Malicious PDF — malware analysis report

Static analysis result for SHA-256 cdd019d698c24103…

MALICIOUS

PDF

52.1 KB Created: 2020-08-24 13:14:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1fd80880ea25e3f5586519bbfaadba7c SHA-1: 6f1ebcf83d36b77c1f641e2101277c843d524349 SHA-256: cdd019d698c24103c3f258d35ec9e56d97cecb4437cdf8529643108e576642f9
152 Risk Score

Malware Insights

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

The PDF contains a significant number of embedded links, identified as a link farm, pointing to various external resources. One critical URL, https://ttraff.ru/pify?keyword=pravastatin+davis+drug+guide+pdf, is flagged as a known malicious redirector. This suggests the document's primary purpose is to lure users into clicking these links, which likely lead to malicious sites for phishing or malware delivery. No scripts were extracted, but the structure and linked URLs strongly indicate a 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.ru/pify?keyword=pravastatin+davis+drug+guide+pdf
    • http://files.sproutmeadows.com/uploads/1/3/0/8/130813528/texowiriniranoden.pdf
    • http://files.worksbysage.com/uploads/1/3/0/7/130740536/jawugogirurevolu.pdf
    • http://files.mopsatvoyagers.com/uploads/1/3/2/6/132683040/xuzaziwalepup_nesudodul.pdf
    • http://tidira.formulasupervee.com/uploads/1/3/2/8/132814930/66bf19.pdf
    • http://files.tropicgardengems.com/uploads/1/3/1/6/131606349/tazasiminarirux_wugedizijolafa_bafidukabotipu.pdf
    • https://cdn.shopify.com/s/files/1/0440/3838/9925/files/ksiki_do_czytania_po_angielsku_dla_pocztkujcych.pdf
    • https://cdn.shopify.com/s/files/1/0437/6874/2040/files/php_simplexml_to_array.pdf
    • https://cdn.shopify.com/s/files/1/0431/2072/2080/files/puzurimoniluvajenonum.pdf
    • https://cdn.shopify.com/s/files/1/0432/2682/4863/files/beetlejuice_day-_o_banana_boat_song.pdf
    • https://cdn.shopify.com/s/files/1/0441/1126/5944/files/18161297276.pdf
    • https://cdn.shopify.com/s/files/1/0435/2137/6410/files/sql_server_2020_administration_guide.pdf
    • https://cdn.shopify.com/s/files/1/0428/8974/0441/files/56702941315.pdf
    • https://cdn.shopify.com/s/files/1/0433/7994/9718/files/sawalab.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_off000073cd.bin
9776ce398a849f58582fc78d331ab2e446f79346f5cefc90f08534c84e2b96e6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x73CD 5240 bytes
font_01_sfnt_off000085ac.bin
ae4b4a8cc01cef2c418031a43898168bd42b7300a004dc6e1800895553d9681c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x85AC 11760 bytes
font_02_sfnt_off0000ae29.bin
9759ce8d6b03285eaaf0b3a467cae172b6556f7d7d175f3d646a9f0b73e2040d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAE29 16160 bytes

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