Malicious PDF — malware analysis report

Static analysis result for SHA-256 a321d89ef776eb90…

MALICIOUS

PDF

43.0 KB Created: 2020-08-03 05:50:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1a547bcccc5560a433428be65e77c43e SHA-1: f0ab7413c34cf857c041807869d69c4fd1908e34 SHA-256: a321d89ef776eb903ce2350e82bca3ea600bbffce4a1544d52f7b8e632a4f586
152 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://ttraff.com/pify?keyword=naruto+shippuden+episode+392+english+dubbed'. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded links, many of which are to Shopify domains hosting other PDFs. The ML classifier strongly flagged this PDF as malicious. The primary attack vector appears to be social engineering through a lure related to popular media, directing users to a potentially harmful URL.

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=naruto+shippuden+episode+392+english+dubbed
    • http://files.exxcelpainting.com/uploads/1/3/0/8/130873851/bimizifemofezog_pirilegera_jazojit_guzifudofobel.pdf
    • http://files.uglysaves.org/uploads/1/3/1/1/131164552/d06627f83.pdf
    • http://files.rsu14teachertech.org/uploads/1/3/1/3/131383837/xarer-raziwesanex.pdf
    • https://cdn.shopify.com/s/files/1/0435/5063/8241/files/furunen.pdf
    • https://cdn.shopify.com/s/files/1/0440/0496/6565/files/miweja.pdf
    • https://cdn.shopify.com/s/files/1/0431/8376/7713/files/xogatilaruduparuwulibe.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/76640573288.pdf
    • https://cdn.shopify.com/s/files/1/0429/4436/4710/files/90359533159.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/kemisavixazesunomezixe.pdf
    • https://cdn.shopify.com/s/files/1/0428/0143/0695/files/kajafopusuzeboluzelidize.pdf
    • https://cdn.shopify.com/s/files/1/0434/9159/0308/files/32919013009.pdf
    • https://cdn.shopify.com/s/files/1/0432/7027/5237/files/dufabekisakunegegobob.pdf
    • https://cdn.shopify.com/s/files/1/0427/4146/5244/files/46951794493.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/faxusumowavunisipor.pdf
    • https://cdn.shopify.com/s/files/1/0437/8145/6023/files/77021022090.pdf
    • https://cdn.shopify.com/s/files/1/0429/0904/0803/files/37861579708.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000057a5.bin
6726a44af6075fad7abfb9f763caa6911a67e9ceb9496cf9a17fe104f6be34aa		 pdf-font-stream PDF embedded font (sfnt) at offset 0x57A5 5664 bytes
font_01_sfnt_off00006ad8.bin
12d0545df11355aff3847225437d65afebd87347bbf06676aa450647dadcbb27		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6AD8 11928 bytes
font_02_sfnt_off000090d0.bin
1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361		 pdf-font-stream PDF embedded font (sfnt) at offset 0x90D0 4324 bytes

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