Malicious PDF — malware analysis report

Static analysis result for SHA-256 a48a49c869cf7cca…

MALICIOUS

PDF

55.2 KB Created: 2020-08-07 19:57:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f3b425b0f89971c150cad2725e538fe1 SHA-1: 5cf83ca1329641903f426393e7f752a717f56b61 SHA-256: a48a49c869cf7cca0c7ba9753dc25af9ba8ae35948a06e7ef1ea8a635c0422f1
152 Risk Score

Malware Insights

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

The PDF contains a mass of external links, including a critical link to a known malicious redirector at ttraff.com. The document body text, though heavily obfuscated, contains the same lure as the redirector URL, suggesting the PDF's primary purpose is to drive traffic to malicious infrastructure. No scripts were extracted from this sample.

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/wb?keyword=transformar%20pdf%20em%20ppt%20editavel%20online
    • http://files.deliaharrington.com/uploads/1/3/0/7/130776447/defifunegiguj.pdf
    • http://files.bluedahliamakeup.com/uploads/1/3/1/4/131453194/mevaji-samew-mubojuwo.pdf
    • http://files.brahmansystems.com/uploads/1/3/1/4/131407045/8907027.pdf
    • http://files.deserthillsdrive.com/uploads/1/3/0/8/130874205/nujefisof_vewabitep_womebisexaka.pdf
    • https://cdn.shopify.com/s/files/1/0429/2739/0887/files/lareno.pdf
    • https://cdn.shopify.com/s/files/1/0431/2439/2087/files/92494106028.pdf
    • https://cdn.shopify.com/s/files/1/0437/3449/9493/files/99296302852.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/sovir.pdf
    • https://cdn.shopify.com/s/files/1/0435/9893/8274/files/xizebavitujezotow.pdf
    • https://cdn.shopify.com/s/files/1/0434/1402/8444/files/aspern_papers_henry_james.pdf
    • https://cdn.shopify.com/s/files/1/0430/6275/5490/files/21428450968.pdf
    • https://cdn.shopify.com/s/files/1/0430/6301/7629/files/devemijasapixawiralufa.pdf
    • https://cdn.shopify.com/s/files/1/0427/7148/0742/files/vegiduz.pdf
    • https://cdn.shopify.com/s/files/1/0432/4527/3251/files/ridipomomaxiwamusoxokif.pdf
    • https://cdn.shopify.com/s/files/1/0435/0102/7493/files/53711864196.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005e6b.bin
b58c3aaba8cb370ca1f40d16501a9355b25616aeef118fb62fd590fd558a7233		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5E6B 4984 bytes
font_01_sfnt_off00006f42.bin
266dfece77a2601ea54f3b5c18bb795624c63f3cd4da9aecfdb07eebebd156f5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6F42 26740 bytes
font_02_sfnt_off0000a996.bin
6f30d31ab53d325f4e3f08a53e883132ea92c501d32d7b77fa495aa04f83fc5c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA996 16312 bytes
font_03_sfnt_off0000bf21.bin
8405bb6ca9a6fb718a2e910e1cdde4d74ac2122cab0061dc5f772322db9c7ccd		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBF21 4324 bytes

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