Malicious PDF — malware analysis report

Static analysis result for SHA-256 b40088730a10aeb3…

MALICIOUS

PDF

41.0 KB Created: 2020-08-09 23:35:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 597529472096977d861092cf45087758 SHA-1: c3e00814abfbb32383e7215c8aa46949d667bbde SHA-256: b40088730a10aeb37a40180608e52c286ddfd0c366e1618591b36a2ed57792cf
120 Risk Score

Malware Insights

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

The PDF was identified as a malicious redirector and a link farm, containing numerous embedded URLs. The primary malicious URL, https://ttraff.ru/pify?keyword=familia+bixaceae+pdf, is a known redirector. The document body is heavily obfuscated and contains metadata suggesting it was generated by wkhtmltopdf, but the presence of many links points towards a delivery mechanism for further malicious content. No scripts were extracted from this sample.

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=familia+bixaceae+pdf
    • http://files.djsk8.com/uploads/1/3/0/9/130969985/e6de39f01754.pdf
    • http://files.thefamilyfuckup.com/uploads/1/3/2/6/132695397/vikama.pdf
    • http://files.thewaxball.com/uploads/1/3/2/7/132740241/bolej.pdf
    • http://files.according2genesis.org/uploads/1/3/1/6/131606923/fevokolilugami-badizopuvuna.pdf
    • https://cdn.shopify.com/s/files/1/0428/2014/1223/files/70058002821.pdf
    • https://cdn.shopify.com/s/files/1/0431/2891/4074/files/1934293608.pdf
    • https://cdn.shopify.com/s/files/1/0429/3869/5846/files/stardew_valley_quality_sprinkler.pdf
    • https://cdn.shopify.com/s/files/1/0429/7365/9290/files/12422774602.pdf
    • https://cdn.shopify.com/s/files/1/0430/9372/1255/files/jesuit_extreme_oath.pdf
    • https://cdn.shopify.com/s/files/1/0432/3573/7755/files/14725825238.pdf
    • https://cdn.shopify.com/s/files/1/0433/0645/1094/files/40773208468.pdf
    • https://cdn.shopify.com/s/files/1/0430/4135/7973/files/tesizonajogibusubewufaw.pdf
    • https://cdn.shopify.com/s/files/1/0429/8155/6375/files/batman_emoji_for_android.pdf
    • https://cdn.shopify.com/s/files/1/0431/9890/6528/files/memento_mori_jonathan_nolan_download.pdf
    • https://cdn.shopify.com/s/files/1/0435/4070/9527/files/juralaparagojajejivod.pdf
    • https://cdn.shopify.com/s/files/1/0427/4615/1078/files/gululefopatire.pdf
    • https://cdn.shopify.com/s/files/1/0436/7400/9753/files/wildgame_innovations_camera_troubleshooting.pdf
    • https://cdn.shopify.com/s/files/1/0429/6137/1290/files/gerame.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_off000062b5.bin
6741104df6e1fc01b755e46bb77f90cfdfc1523885d133fbd64f2c6efbf29003
pdf-font-stream PDF embedded font (sfnt) at offset 0x62B5 5188 bytes
font_01_sfnt_off00007454.bin
7538d4a7ba6b38b75480dcb5db5ada612cfe1f68c4862ac0b5b3efd96393c490
pdf-font-stream PDF embedded font (sfnt) at offset 0x7454 10008 bytes