Malicious PDF — malware analysis report

Static analysis result for SHA-256 2476b3a069dc8571…

MALICIOUS

PDF

58.2 KB Created: 2020-08-01 14:46:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 23f124b649f2e5c17d5ab54c76cb3297 SHA-1: 3289c10ef39808b46d55e38ebf9222a36e7123cc SHA-256: 2476b3a069dc8571d9a97339667671616fd4c4a2399a54153a53640ef317a936
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://ttraff.com/pify?keyword=pewdiepies+minecraft+seed'. Additionally, it features a PDF link farm heuristic, indicating a large number of external links, with the first being 'https://cdn.shopify.com/s/files/1/0430/7006/2754/files/16767514263.pdf'. The ML classifier also flagged this PDF with a very high score. The document body, though heavily obfuscated, contains the same URL as the redirector, suggesting the document's primary purpose is to direct users to this malicious site.

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=pewdiepies+minecraft+seed
    • http://files.sharicookson.com/uploads/1/3/0/7/130775498/ad26e.pdf
    • http://files.anestesia-triveneto.org/uploads/1/3/1/6/131607374/4722937.pdf
    • http://files.exercise4happiness.com/uploads/1/3/1/6/131637606/7286347d.pdf
    • https://cdn.shopify.com/s/files/1/0430/7006/2754/files/16767514263.pdf
    • https://cdn.shopify.com/s/files/1/0433/9489/1943/files/2825287615.pdf
    • https://cdn.shopify.com/s/files/1/0433/9807/0426/files/zugezef.pdf
    • https://cdn.shopify.com/s/files/1/0430/7599/3764/files/bobapudin.pdf
    • https://cdn.shopify.com/s/files/1/0430/7759/9383/files/23785529924.pdf
    • https://cdn.shopify.com/s/files/1/0428/9832/5671/files/botw_stamina_recipes.pdf
    • https://cdn.shopify.com/s/files/1/0431/0515/7284/files/zugarajupetesixedon.pdf
    • https://cdn.shopify.com/s/files/1/0440/7649/9096/files/hayne_manual_online.pdf
    • https://cdn.shopify.com/s/files/1/0430/7605/9290/files/53308621592.pdf
    • https://cdn.shopify.com/s/files/1/0432/9963/5355/files/sozubowimizogarumemowi.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/xazijejizamoketabuguta.pdf
    • https://cdn.shopify.com/s/files/1/0429/4891/9450/files/pugopugapepidepegetam.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_off00009891.bin
c31770ae48cd9a834bd4a38cbff97f4700670f8aedff7f5325231b497e5d087a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9891 5040 bytes
font_01_sfnt_off0000a99b.bin
6948dc5c1a9a2fe5211fcf549551ed0f58eb3541b0c983e20401c8bded9dafcf		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA99B 10576 bytes
font_02_sfnt_off0000cd2c.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCD2C 4324 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.