Malicious PDF — malware analysis report

Static analysis result for SHA-256 ec14713f7684b977…

MALICIOUS

PDF

45.2 KB Created: 2020-07-23 12:42:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 31f8beeb2af48c50396e6e230aa208b8 SHA-1: 204edc31a091dd700e76ff1718fd33b843f26c95 SHA-256: ec14713f7684b977cb352ada738ae0c444758c2c9275a16de215d7d51b088fe6
152 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with one pointing to a known malicious redirector (ttraff.com). The document body, though heavily obfuscated, appears to be a user guide, suggesting a lure for users to click on these links. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK and PDF_SEO_LINK_FARM strongly indicate a malicious intent to redirect users to potentially harmful sites.

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=friedland+libra+d282+user+guide
    • http://files.nickblaisdell.com/uploads/1/3/1/4/131454383/ketapatexe.pdf
    • http://files.handmadebylouisa.com/uploads/1/3/0/8/130874400/zupojavekere.pdf
    • http://files.usfproject-benitez.com/uploads/1/3/1/4/131454899/5979240e700ba0.pdf
    • http://files.usfproject-benitez.com/uploads/1/3/1/4/131454899/5979240e700b
    • https://cdn.shopify.com/s/files/1/0435/7701/6483/files/16728477728.pdf
    • https://cdn.shopify.com/s/files/1/0434/8493/8402/files/sumuzumarikotavati.pdf
    • https://cdn.shopify.com/s/files/1/0433/5173/6488/files/dunekisaposutoziki.pdf
    • https://cdn.shopify.com/s/files/1/0431/6138/7170/files/83759315694.pdf
    • https://cdn.shopify.com/s/files/1/0428/8184/3356/files/45779706284.pdf
    • https://cdn.shopify.com/s/files/1/0429/9977/5381/files/rijujufadovatovuloz.pdf
    • https://cdn.shopify.com/s/files/1/0435/8026/0511/files/64195646437.pdf
    • https://cdn.shopify.com/s/files/1/0431/2471/9773/files/kepewizonogemijozavizina.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/zeranosorijajigafa.pdf
    • https://cdn.shopify.com/s/files/1/0435/3189/4944/files/lijedot.pdf
    • https://cdn.shopify.com/s/files/1/0432/1175/1579/files/99584825116.pdf
    • https://cdn.shopify.com/s/files/1/0432/6352/5029/files/waponegirana.pdf
    • https://cdn.shopify.com/s/files/1/0427/8901/1612/files/32980026659.pdf
    • https://cdn.shopify.com/s/files/1/0434/5567/6583/files/janupujosaruduf.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_off000072e1.bin
88f64e6d590ccc87b64424cbe6feec29ce1f2a728970cbc9d7ff2ea147616ec8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x72E1 5108 bytes
font_01_sfnt_off0000842e.bin
bcebcb83d002a21f64c7d4651309113b3d8995b579369a2af43b7d6dedd1b41c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x842E 10768 bytes

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