Malicious PDF — malware analysis report

Static analysis result for SHA-256 e82a6add259338da…

MALICIOUS

PDF

43.1 KB Created: 2020-08-03 12:10:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 77ca0d197274eb8957fac693ab75cd1a SHA-1: 54323bf4e9618c7d7b1793178d5634cd8eb3f481 SHA-256: e82a6add259338da8325637ff6a6250edb18aab585f8e0872f0e1229a9a1a268
120 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to a redirector service. The document body text, while containing keywords like 'Basics of electronics interview questions and answers pdf', appears to be a lure to encourage users to click on the malicious links. The primary malicious link identified is ttraff.ru, which is known to host redirectors.

Heuristics 3

  • 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.
  • 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.ru/pify?keyword=basics+of+electronics+interview+questions+and+answers+pdf In PDF document text
    • http://files.asproengineering.com/uploads/1/3/2/6/132695832/077f708a6dd.pdfIn PDF document text
    • http://files.bakerlawga.com/uploads/1/3/0/7/130775704/5316049.pdfIn PDF document text
    • http://files.katherinebholland.com/uploads/1/3/1/4/131407233/xotiparafonalop_nakobibetiriwop_konoganebu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/1723/8685/files/xonaregifopip.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/70745323757.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3884/2779/files/56859521066.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1518/4295/files/ketedabigixidenoxosasalan.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/4229/0336/files/beganudi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9072/2454/files/pezewodekalosinezozu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6301/7629/files/87295666582.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2440/8991/files/kugijogovi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/biludetejuvujatolometa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7113/6154/files/kokawomofupiledibadada.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5467/7662/files/fumari.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/3248/6823/files/podifoj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/3349/1613/files/sonezil.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006981.bin
b999e5c36c605d1d8bf6d13e7c4be4f04607804b2a5c4043f73b918473aca224
pdf-font-stream PDF embedded font (sfnt) at offset 0x6981 5476 bytes
font_01_sfnt_off00007c45.bin
7f2f3075637b904a699a301d4e73846760234628f759dededebb48604a0e127d
pdf-font-stream PDF embedded font (sfnt) at offset 0x7C45 10276 bytes