Malicious PDF — malware analysis report

Static analysis result for SHA-256 d4c9509394147f4a…

MALICIOUS

PDF

43.1 KB Created: 2020-08-09 21:05:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fc41fb26cf11d530588d49e6f1d2bd74 SHA-1: 455e5773498424b7ec71a9f1976e376bf2c77081 SHA-256: d4c9509394147f4ac090646a5db5e8af4bac61247153a390f7568e393714960f
152 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to a link farm hosted on cdn.shopify.com. One of the primary links, 'https://ttraff.cc/pify?keyword=speed+and+agility+drills+for+football+pdf', is flagged as a known malicious redirector. The document body, though heavily obfuscated, contains this malicious URL and other benign-looking PDF links, suggesting a social engineering attempt to trick users into clicking through to malicious content. The ML classifier also strongly indicated maliciousness.

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.cc/pify?keyword=speed+and+agility+drills+for+football+pdf
    • http://files.ebonytresses.com/uploads/1/3/1/4/131406785/25fa5555a932f21.pdf
    • http://files.lab302.net/uploads/1/3/1/8/131871535/xoxonizoguwuw-vasexaboxukil.pdf
    • http://files.gsha-sc.org/uploads/1/3/1/4/131438389/mineburumiguv.pdf
    • http://files.capturethestarsworkshops.com/uploads/1/3/0/7/130738870/326501.pdf
    • https://cdn.shopify.com/s/files/1/0429/3692/6374/files/fowawowulevepagewijuloxi.pdf
    • https://cdn.shopify.com/s/files/1/0427/8904/4383/files/46302916049.pdf
    • https://cdn.shopify.com/s/files/1/0428/3862/2375/files/absorcin_de_lipidos.pdf
    • https://cdn.shopify.com/s/files/1/0433/4790/2623/files/momepewuwawexejewoxat.pdf
    • https://cdn.shopify.com/s/files/1/0433/8050/6791/files/sobajemen.pdf
    • https://cdn.shopify.com/s/files/1/0433/0265/0014/files/libro_cincuenta_sombras_mas_oscuras.pdf
    • https://cdn.shopify.com/s/files/1/0432/2977/3981/files/viwukavoju.pdf
    • https://cdn.shopify.com/s/files/1/0437/9105/7058/files/sasadoxikevufexa.pdf
    • https://cdn.shopify.com/s/files/1/0431/3792/5281/files/c_guessing_game.pdf
    • https://cdn.shopify.com/s/files/1/0431/3723/7146/files/kepepujadelukoxuzozusilo.pdf
    • https://cdn.shopify.com/s/files/1/0430/1763/3945/files/damedewegubowesij.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/gamusuzojikifikukudubug.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/66916333827.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_off0000695f.bin
676938b1a70a0b2ef05aedc71cdd82defc3612f35a845d135aaafb9b69f762eb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x695F 5556 bytes
font_01_sfnt_off00007c52.bin
194a7efe7a8522b5fdf6eded86c8bbd111d82efaa49ff06bca5781317025cecd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7C52 10212 bytes

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