Malicious PDF — malware analysis report

Static analysis result for SHA-256 9f296b1ae649c784…

MALICIOUS

PDF

48.8 KB Created: 2020-08-08 10:47:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 293ec71e8971da9099bd9b05a2330fdd SHA-1: d001449a560649ac286234e0fd26f3c0ed23babc SHA-256: 9f296b1ae649c78495a1f7810cecd0f528fe8f4a7d79efa830ca220cd5fc8239
154 Risk Score

Malware Insights

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

The PDF contains numerous links, including one to a known malicious redirector, disguised as a business textbook. The ML classifier strongly flagged this PDF as malicious. The presence of a link farm suggests an attempt to distribute malicious content or engage in SEO manipulation for malicious purposes. No scripts were extracted, but the primary attack vector appears to be social engineering via deceptive links.

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=understanding+business+11th+edition+mcgraw+hill+pdf
    • http://files.coffeynotes.com/uploads/1/3/1/4/131407226/00242bb.pdf
    • http://redaxisof.roogulli.com/uploads/1/3/1/4/131452821/popadataj_dubojofiwu_wetegupeje_pavalabewinikuw.pdf
    • http://files.espin-inc.com/uploads/1/3/1/0/131071067/nigunata-jevipule.pdf
    • http://files.nmffa.org/uploads/1/3/0/8/130874317/wapuxuwupuneda_logalitano.pdf
    • https://cdn.shopify.com/s/files/1/0431/3687/6695/files/minusezetegunamux.pdf
    • https://cdn.shopify.com/s/files/1/0430/8946/1410/files/29269588116.pdf
    • https://cdn.shopify.com/s/files/1/0427/9717/0847/files/pamelubosa.pdf
    • https://cdn.shopify.com/s/files/1/0431/5470/2496/files/nefitilulatugipibe.pdf
    • https://cdn.shopify.com/s/files/1/0431/1423/4016/files/tidumup.pdf
    • https://cdn.shopify.com/s/files/1/0432/1384/8733/files/63496776440.pdf
    • https://cdn.shopify.com/s/files/1/0429/1028/5990/files/tobewola.pdf
    • https://cdn.shopify.com/s/files/1/0431/6240/2967/files/59227711570.pdf
    • https://cdn.shopify.com/s/files/1/0436/0998/1085/files/vababozadumaboxexuti.pdf
    • https://cdn.shopify.com/s/files/1/0432/4071/8496/files/fesilomanagimiwa.pdf
    • https://cdn.shopify.com/s/files/1/0438/4423/9510/files/vatedew.pdf
    • https://cdn.shopify.com/s/files/1/0436/9914/2810/files/tunawutegogapinowij.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/kenawuvotijogajutimev.pdf
    • https://cdn.shopify.com/s/files/1/0429/2971/7407/files/fitozuvus.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_off0000774d.bin
24df05f3ad0c635e55b569d208ce3f484db769ad1a84ef09f15b77eff43a1141		 pdf-font-stream PDF embedded font (sfnt) at offset 0x774D 5844 bytes
font_01_sfnt_off00008b24.bin
a3f835349ac9d99fc3ce27aa5d12a86881fb53501c9c40d1d034266418732593		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8B24 13364 bytes

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