Malicious PDF — malware analysis report

Static analysis result for SHA-256 11f11e77895a0735…

MALICIOUS

PDF

44.5 KB Created: 2020-08-04 16:59:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 80720a2747efad6763ab109bbec5458d SHA-1: 7d134c8da6d845385f9f31137f77bfbdb6ca7696 SHA-256: 11f11e77895a0735ae585f1614b0539f4602a06ea25835bfb294b8a1826a73c9
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm and a redirector to malicious infrastructure, as indicated by the PDF_SEO_LINK_FARM and PDF_MALICIOUS_REDIRECTOR_LINK heuristics. The document body, though heavily obfuscated, contains references to the malicious URL and other PDF links, suggesting an attempt to drive traffic to potentially harmful content. The ML classifier also 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=malaria+treatment+failure+pdf
    • http://files.buddysplacenashville.com/uploads/1/3/1/3/131379421/nuriku.pdf
    • http://files.servdmelbourne.com/uploads/1/3/0/7/130740264/f4dcbbec364ae2.pdf
    • http://files.thejosienetwork.com/uploads/1/3/0/7/130740591/guwegesisofagotumeb.pdf
    • http://files.alisonhoward.com/uploads/1/3/1/4/131438464/2663340.pdf
    • http://files.reverieofthereal.republicofdaydreams.com/uploads/1/3/1/8/131871433/tigekamobi.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0429/8165/4687/files/dexufobowezutugowiwe.pdf
    • https://cdn.shopify.com/s/files/1/0432/7096/3350/files/pejozanadofezazisowosi.pdf
    • https://cdn.shopify.com/s/files/1/0429/0415/8375/files/jamako.pdf
    • https://cdn.shopify.com/s/files/1/0431/1724/8672/files/82825876972.pdf
    • https://cdn.shopify.com/s/files/1/0440/6634/1029/files/94361073995.pdf
    • https://cdn.shopify.com/s/files/1/0427/9032/2342/files/68002247150.pdf
    • https://cdn.shopify.com/s/files/1/0433/0897/4235/files/46555026034.pdf
    • https://cdn.shopify.com/s/files/1/0432/7420/7387/files/daxuri.pdf
    • https://cdn.shopify.com/s/files/1/0432/4032/5282/files/galiwesivixudonawal.pdf
    • https://cdn.shopify.com/s/files/1/0428/7463/4403/files/fojiriraba.pdf
    • https://cdn.shopify.com/s/files/1/0434/7972/8281/files/suburban_noize_records.pdf
    • https://cdn.shopify.com/s/files/1/0431/1423/4016/files/dixagimikij.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000703c.bin
cf8b901d20f19b802adde15e8310eede440ecc5a28f92c25639346c4497ce415		 pdf-font-stream PDF embedded font (sfnt) at offset 0x703C 5012 bytes
font_01_sfnt_off0000813f.bin
428d8b6d7dfbdb40c9fffcc7ea744597590a5b3efb816cc303cb551844d3432a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x813F 10692 bytes

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