Malicious PDF — malware analysis report

Static analysis result for SHA-256 06da0a464695e72f…

MALICIOUS

PDF

50.0 KB Created: 2020-08-11 22:00:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3966b3a5588246fade63e5de381198a3 SHA-1: 66d461f272e95e0ff6fa1e857b1a9329f1112f78 SHA-256: 06da0a464695e72f786f45962a959c5b85aff33e1acbdaef957da72fa4dd7a15
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, many of which point to a redirector infrastructure known for malicious activity. The document body, though heavily obfuscated, contains the URL 'https://ttraff.ru/pify?keyword=blockchain+decrypted+for+2020+pdf', suggesting a lure related to cryptocurrency or financial information. The ML classifier strongly indicated maliciousness, and the presence of a malicious redirector confirms the intent to lead users to harmful content.

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=blockchain+decrypted+for+2020+pdf
    • http://files.thebookboyfriend.net/uploads/1/3/2/7/132740480/3409920.pdf
    • http://files.catwalkgodalming.com/uploads/1/3/0/8/130814758/852958.pdf
    • http://files.cultivatemusicstudio.com/uploads/1/3/0/7/130740097/xuguj.pdf
    • http://files.shannonbayliss.com/uploads/1/3/2/3/132303010/2169624.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0437/8833/7313/files/wotibe.pdf
    • https://cdn.shopify.com/s/files/1/0437/6520/3093/files/selection_does_not_contain_a_main_type.pdf
    • https://cdn.shopify.com/s/files/1/0427/9838/3260/files/binomial_probability_practice.pdf
    • https://cdn.shopify.com/s/files/1/0438/2828/1506/files/95352355255.pdf
    • https://cdn.shopify.com/s/files/1/0435/6666/1800/files/nijomex.pdf
    • https://cdn.shopify.com/s/files/1/0429/5216/3482/files/kuridiwevabivuwo.pdf
    • https://cdn.shopify.com/s/files/1/0429/7824/6815/files/jiwinikivaf.pdf
    • https://cdn.shopify.com/s/files/1/0434/4102/9276/files/pibinuvugizoxitoju.pdf
    • https://cdn.shopify.com/s/files/1/0432/8947/7273/files/subject_verb_agreement_worksheets_grade_6.pdf
    • https://cdn.shopify.com/s/files/1/0438/4351/8629/files/83714353035.pdf
    • https://cdn.shopify.com/s/files/1/0432/2613/6743/files/8331306236.pdf
    • https://cdn.shopify.com/s/files/1/0427/8360/4903/files/58271618992.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_off0000831e.bin
16a190607accaa9950fc6af7e7a18047356b3ead68eef5b02d9d8677164a8ae9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x831E 5556 bytes
font_01_sfnt_off000095f9.bin
667b447735e5fe09f154db91d9f53b3ff86e326f43f9ec0619e9bce6ec9b46cd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x95F9 10724 bytes

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