Malicious PDF — malware analysis report

Static analysis result for SHA-256 0cbd42adf7bd8973…

MALICIOUS

PDF

43.3 KB Created: 2020-08-16 21:58:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 13614aa6746af4ec591bfca043cb8595 SHA-1: 07aa26399580fb07aa5fd262cd48142883f75702 SHA-256: 0cbd42adf7bd8973ca0dc24a569dd217623c778acf6ddf866ce9e7b5b03ead30
154 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, with a critical heuristic identifying it as a malicious redirector link farm. The primary malicious URL, https://ttraff.ru/pify?keyword=lagu+almost+is+never+enough+original, is a strong indicator of malicious intent, likely leading to phishing or malware. While no scripts were explicitly extracted, the structure and heuristics suggest an attempt to lure users to malicious sites, aligning with spearphishing tactics.

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=lagu+almost+is+never+enough+original
    • http://files.familyenrichmentireland.org/uploads/1/3/1/6/131606730/8473938e373.pdf
    • http://gexumuki.sdbau.shop/uploads/1/3/0/7/130739783/5467553.pdf
    • http://files.actdu.org.au/uploads/1/3/1/4/131454883/2285660.pdf
    • http://fafux.thewriteblend.com/uploads/1/3/2/6/132680813/c7e035233485a.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/10809735118.pdf
    • https://cdn.shopify.com/s/files/1/0429/8221/1735/files/92803603468.pdf
    • https://cdn.shopify.com/s/files/1/0430/8451/3440/files/51372943646.pdf
    • https://cdn.shopify.com/s/files/1/0451/8638/4023/files/akroasis_tab_book.pdf
    • https://cdn.shopify.com/s/files/1/0428/9606/4671/files/9266871514.pdf
    • https://cdn.shopify.com/s/files/1/0434/0357/5454/files/radoladonexopirofizotozel.pdf
    • https://cdn.shopify.com/s/files/1/0429/9217/3217/files/tovurajipukutisodilo.pdf
    • https://cdn.shopify.com/s/files/1/0429/1543/0553/files/fevowezojugudigut.pdf
    • https://cdn.shopify.com/s/files/1/0435/6594/0904/files/56081666035.pdf
    • https://cdn.shopify.com/s/files/1/0432/3042/9352/files/34935981231.pdf
    • https://cdn.shopify.com/s/files/1/0436/5120/3225/files/zumazirusetadufilubakesi.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006136.bin
96763491784a8f2f8c8640cf8876912a6462cc7338d1cca552fde460ece23c22		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6136 2940 bytes
font_01_sfnt_off00006bbf.bin
1d228bad24adb22ffe88faaeab359a4957e50f17eafe539c6dda735a5a0df046		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6BBF 5100 bytes
font_02_sfnt_off00007cf8.bin
57be35a388f11ded157267efc194989127e6876770aff1b47de2923ad1360454		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7CF8 10240 bytes

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