Malicious PDF — malware analysis report

Static analysis result for SHA-256 9e6f0569a625e93b…

MALICIOUS

PDF

47.9 KB Created: 2020-09-07 04:39:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a3b8926abb515a7839e24f68bcbbd371 SHA-1: 30175cfd0cedc4bf800db6aa3131f202097001f6 SHA-256: 9e6f0569a625e93be1b55bd27fc636a00afcf0dae1e97990949cebafad9573ca
150 Risk Score

Malware Insights

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

The PDF file contains a high number of embedded links, with a critical heuristic firing for PDF_SEO_LINK_FARM. One of these links, https://ttraff.me/wix?keyword=whatsapp+apps+2018+free, is flagged as a malicious redirector. The document body, though heavily obfuscated, contains text related to 'Whatsapp apps 2018 free', suggesting a lure to attract clicks. The ML classifier also strongly indicates maliciousness.

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.me/wix?keyword=whatsapp+apps+2018+free
    • https://cdn.shopify.com/s/files/1/0430/0609/9605/files/keras_conv1d_example.pdf
    • https://cdn.shopify.com/s/files/1/0440/8469/1094/files/chukar_mere_man_ko_instrumental_ringtone.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/mevadijuxirefasu.pdf
    • https://cdn.shopify.com/s/files/1/0437/5281/6798/files/65686601939.pdf
    • https://static.usrfiles.com/ugd/4b874d_5f37884490eb47128011d3d091cb4c64.pdf
    • https://cdn.shopify.com/s/files/1/0429/6946/4991/files/videgowur.pdf
    • https://cdn.shopify.com/s/files/1/0429/6772/8279/files/27203254294.pdf
    • https://cdn.shopify.com/s/files/1/0433/1044/8795/files/68939221664.pdf
    • https://cdn.shopify.com/s/files/1/0435/4146/3204/files/zibidikuwe.pdf
    • https://cdn.shopify.com/s/files/1/0429/2041/1303/files/apex_legends_app_store.pdf
    • https://cdn.shopify.com/s/files/1/0428/1604/5222/files/ruzoxutirupofatilefov.pdf
    • https://cdn.shopify.com/s/files/1/0433/7595/2030/files/dinip.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_off000070a0.bin
769da9be866cea86ceeaedd962bb9d24c471dfc37a3bc4e6313e94fd361dc359		 pdf-font-stream PDF embedded font (sfnt) at offset 0x70A0 5492 bytes
font_01_sfnt_off0000834e.bin
9955be659735df9034fd00ad9d64280f6503b6a02db8edde50d175952318a6df		 pdf-font-stream PDF embedded font (sfnt) at offset 0x834E 2320 bytes
font_02_sfnt_off00008dbf.bin
cc1c8d6ee7369979059b91c9ef40d056d994da813021129722007527abffe3ce		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8DBF 10912 bytes

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