Malicious PDF — malware analysis report

Static analysis result for SHA-256 6d848adfbbb765d4…

MALICIOUS

PDF

39.2 KB Created: 2020-08-16 00:53:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 553f9a6e7c2102fa215469c4b3c7736e SHA-1: 49d0d3815b7eae030029c96f98fc5f3711fc92cd SHA-256: 6d848adfbbb765d4ca27dcaaea9215541cb6bb07dac778701be91f39ea00463d
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains embedded links, one of which points to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains text related to 'Businessman movie songs mp4' and a URL that appears to be a lure. The presence of numerous PDF links, many hosted on Shopify, suggests a link farm designed to distribute malicious content. No scripts were extracted, but the primary malicious activity observed is the redirection to a 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.ru/pify?keyword=businessman+movie+songs+mp4
    • http://files.constructoraliverpool.com/uploads/1/3/0/9/130968984/7ca9d0.pdf
    • http://files.cartravelsafety.com/uploads/1/3/0/8/130873795/9632531.pdf
    • http://files.studiofred.net/uploads/1/3/2/6/132695832/podixabus_tejibunedomap_tesivev_luzibufir.pdf
    • http://files.sweetstopcandy.com/uploads/1/3/2/3/132303337/8706270.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/3264/0679/files/63301894594.pdf
    • https://cdn.shopify.com/s/files/1/0433/5117/9416/files/17943584172.pdf
    • https://cdn.shopify.com/s/files/1/0435/0771/2155/files/vadotesidexebirenora.pdf
    • https://cdn.shopify.com/s/files/1/0430/8572/5850/files/xobevaxu.pdf
    • https://cdn.shopify.com/s/files/1/0431/8186/7176/files/siburuvuwafenudaj.pdf
    • https://cdn.shopify.com/s/files/1/0429/3260/0985/files/91985884372.pdf
    • https://cdn.shopify.com/s/files/1/0437/2883/0625/files/47855582290.pdf
    • https://cdn.shopify.com/s/files/1/0429/3407/5558/files/ampicilina_injetavel.pdf
    • https://cdn.shopify.com/s/files/1/0434/1802/6142/files/71783122914.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/72645751706.pdf
    • https://cdn.shopify.com/s/files/1/0435/7311/7096/files/sql_server_tutorial_for_experienced.pdf
    • https://cdn.shopify.com/s/files/1/0433/3902/2494/files/politik_identitas_pemilu_2020.pdf
    • https://cdn.shopify.com/s/files/1/0436/5985/3977/files/13739262611.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005b86.bin
85d58e52c40fa141977bc82e1c1e2c00f9fbe415fe8b6b90ea91ffb3fe77cc9e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5B86 5208 bytes
font_01_sfnt_off00006d39.bin
8ed078527141c19c210a3a062b9c106b5908b11a5d9f20676282137fc8172ce1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6D39 10120 bytes

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