Malicious PDF — malware analysis report

Static analysis result for SHA-256 867dbf55ad4c3bfe…

MALICIOUS

PDF

46.6 KB Created: 2020-08-10 08:43:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 120b293eef660c001e4635da9e53ec6e SHA-1: 75d3072949e25e092e71d1bb3244d90290dccbcc SHA-256: 867dbf55ad4c3bfe98d6fae459581bb01f6bc50694297e6448097952cee1bb9f
152 Risk Score

Malware Insights

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

The PDF contains embedded links that redirect to a known malicious URL, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though partially corrupted, suggests a lure related to 'adirondack chair plans pdf download'. The PDF also exhibits characteristics of an SEO link farm, with numerous external links, many pointing to Shopify domains. The primary malicious IOC is the redirector URL, which likely serves as a gateway to further 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.com/pify?keyword=adirondack+chair+plans+pdf+download
    • http://files.readnd.org/uploads/1/3/2/7/132740502/savejefoxevaw.pdf
    • http://files.averyandersongourdart.com/uploads/1/3/0/7/130776266/juninesudi.pdf
    • http://files.bluemountainmusicstudio.com/uploads/1/3/2/6/132696414/tozakugomewufi.pdf
    • http://files.mrgutierrez.net/uploads/1/3/0/8/130814492/6077009.pdf
    • https://cdn.shopify.com/s/files/1/0431/5290/0250/files/variable_valve_timing_intelligent_system.pdf
    • https://cdn.shopify.com/s/files/1/0429/7841/0655/files/nofuwopo.pdf
    • https://cdn.shopify.com/s/files/1/0437/7070/8125/files/biliary_tract_anatomy.pdf
    • https://cdn.shopify.com/s/files/1/0432/0614/8255/files/13549849550.pdf
    • https://cdn.shopify.com/s/files/1/0433/6638/3768/files/wulajebozidusadoko.pdf
    • https://cdn.shopify.com/s/files/1/0446/1743/3251/files/edema_cerebral_definicion.pdf
    • https://cdn.shopify.com/s/files/1/0431/4375/7985/files/miluwumosugot.pdf
    • https://cdn.shopify.com/s/files/1/0432/9432/6939/files/2706916525.pdf
    • https://cdn.shopify.com/s/files/1/0428/3308/4575/files/xurubaza.pdf
    • https://cdn.shopify.com/s/files/1/0431/4667/4336/files/fundamentals_of_engineering_economics_second_edition.pdf
    • https://cdn.shopify.com/s/files/1/0433/6674/4220/files/etina_pro_ivot.pdf
    • https://cdn.shopify.com/s/files/1/0428/2885/7503/files/80298965366.pdf
    • https://cdn.shopify.com/s/files/1/0427/6181/4172/files/21164807651.pdf
    • https://cdn.shopify.com/s/files/1/0435/3998/8648/files/juvoliguwodibibedalo.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000786d.bin
473a841f3b86524a98c9c231d57cdb1a67a55f3807069ee27f69654c006422b5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x786D 5388 bytes
font_01_sfnt_off00008acf.bin
61e3191d9da94f1c5f67c223fe0e606d6521bcf3a3e05ae63169f7dbe80dc5bb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8ACF 10088 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.