Malicious PDF — malware analysis report

Static analysis result for SHA-256 1a786ab441cecb3c…

MALICIOUS

PDF

55.7 KB Created: 2020-08-03 08:14:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0221508393d53c9800d772c6272c60c8 SHA-1: 2fff4a477a639a5efb56b361da7523173aea7202 SHA-256: 1a786ab441cecb3c634fcbe351c9521872bb1308f501dc66e14d6fa4cfc5cc36
150 Risk Score

Malware Insights

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

The PDF was flagged as malicious due to a large number of embedded external links, a common tactic for redirecting users to malicious sites. One such link points to 'ttraff.ru', which is identified as a known malicious redirector. The document body contains garbled text but also includes the suspicious URL, reinforcing the malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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=can+mobs+spawn+on+slabs
    • http://files.wilfriedpulinckx.com/uploads/1/3/1/3/131380146/sexufogasedonataragu.pdf
    • http://files.ivoryleaguepublishing.com/uploads/1/3/1/4/131437775/nefadaw.pdf
    • http://files.myersparkib.org/uploads/1/3/0/7/130739802/fokusipelez.pdf
    • http://files.tayahanson.com/uploads/1/3/2/6/132695586/lunodixunaworiso.pdf
    • http://files.mytechiebuddy.com/uploads/1/3/1/4/131454151/daxijibuvoza-xofipe-sabujetisafud.pdf
    • https://cdn.shopify.com/s/files/1/0436/9504/6824/files/volebuwad.pdf
    • https://cdn.shopify.com/s/files/1/0435/4385/5258/files/fedosadi.pdf
    • https://cdn.shopify.com/s/files/1/0439/9664/3486/files/85248488516.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/paxotaxazojulilinitulo.pdf
    • https://cdn.shopify.com/s/files/1/0438/1461/7250/files/pifozavuwolojof.pdf
    • https://cdn.shopify.com/s/files/1/0433/0281/3849/files/fejatirapojibowiw.pdf
    • https://cdn.shopify.com/s/files/1/0431/4431/5040/files/fijevigiroxo.pdf
    • https://cdn.shopify.com/s/files/1/0431/8488/1825/files/75365228208.pdf
    • https://cdn.shopify.com/s/files/1/0440/0388/5206/files/sivejepime.pdf
    • https://cdn.shopify.com/s/files/1/0430/2661/2378/files/figanokanusulemep.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00009d5b.bin
329b2891546778e6c5903be1e9683a0a1d03bc68c1039a75307adb834a6c22c4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9D5B 5008 bytes
font_01_sfnt_off0000ae5b.bin
592b380d5e4c6c66de664fa9749b901ceafbb6cb43096d1788f88ab7dcbd4470		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAE5B 10352 bytes

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