Malicious PDF — malware analysis report

Static analysis result for SHA-256 31a54eea4a5b01a5…

MALICIOUS

PDF

45.6 KB Created: 2020-08-08 17:00:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3982772765effe89771fe8fec563755c SHA-1: 696b9955a9d7d60ed1343d1cf6d11cd34b5dd4a5 SHA-256: 31a54eea4a5b01a5f15658a83fa65010faf70fc95fc8667a701371cf30102edd
152 Risk Score

Malware Insights

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

The PDF contains numerous links, including a critical redirector link to 'ttraff.com', which is known for malicious activity. The document body, though heavily obfuscated, contains the same lure text and URLs found in the heuristics, indicating a deliberate attempt to trick users into visiting malicious sites. The ML classifier strongly flagged this PDF as malicious.

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=homemade+rc+plane+plans+pdf
    • http://files.ignitethejoy.org/uploads/1/3/1/4/131409009/bamizatitodox-beputugatopuvov.pdf
    • http://files.immaculate-concepts.com/uploads/1/3/2/6/132681891/16ea09.pdf
    • http://files.christianclergyinternational.org/uploads/1/3/2/6/132682230/zelamonebaxi.pdf
    • http://files.cbdisus.co.uk/uploads/1/3/0/9/130969312/5666299.pdf
    • http://files.insidetile.com/uploads/1/3/1/4/131455825/wusimos_lufafibedavat.pdf
    • https://cdn.shopify.com/s/files/1/0430/1216/1685/files/97621000712.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/xazijejizamoketabuguta.pdf
    • https://cdn.shopify.com/s/files/1/0427/6856/4380/files/zujuk.pdf
    • https://cdn.shopify.com/s/files/1/0430/5843/0106/files/71479227101.pdf
    • https://cdn.shopify.com/s/files/1/0432/0981/8272/files/nimunarawuxaganaf.pdf
    • https://cdn.shopify.com/s/files/1/0437/8266/8437/files/30130091209.pdf
    • https://cdn.shopify.com/s/files/1/0429/1998/5319/files/xuraw.pdf
    • https://cdn.shopify.com/s/files/1/0435/1311/8872/files/jeviwejegitebuxi.pdf
    • https://cdn.shopify.com/s/files/1/0432/3550/8387/files/camara_de_comercio_internacional.pdf
    • https://cdn.shopify.com/s/files/1/0429/1274/3591/files/47365114971.pdf
    • https://cdn.shopify.com/s/files/1/0433/6808/7717/files/22926094624.pdf
    • https://cdn.shopify.com/s/files/1/0431/0581/2629/files/biblia_de_estudio_john_macarthur_descargar.pdf
    • https://cdn.shopify.com/s/files/1/0434/9244/2264/files/7971578428.pdf
    • https://cdn.shopify.com/s/files/1/0432/0614/8255/files/dawig.pdf
    • https://cdn.shopify.com/s/files/1/0429/1536/5020/files/dubuw.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_off0000673d.bin
768fabb786edf207bf30c5e85d1d7ba852a90fd1f50f49c56a0f47d7034b1d3c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x673D 4920 bytes
font_01_sfnt_off000077cd.bin
ae0115682e88f50cc744b8f59b3126048a08bd31ca9d26836da81abcf1ab032b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x77CD 10356 bytes
font_02_sfnt_off00009b3b.bin
1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9B3B 4324 bytes

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