Malicious PDF — malware analysis report

Static analysis result for SHA-256 d290d5564fe8cd89…

MALICIOUS

PDF

68.2 KB Created: 2020-08-19 14:08:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 07407cc7397b73456271bcc49b71131a SHA-1: 9f4b814e60f6e33abfdc15b2e3dbe489054fe215 SHA-256: d290d5564fe8cd89ded65a13812c47bafeb359db46ed873378753994af068d84
150 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'ttraff.com'. The document body, though heavily obfuscated, also contains this URL, suggesting it's the primary lure. The PDF also exhibits characteristics of a link farm, with numerous external links, many pointing to Shopify domains, likely for SEO manipulation to increase visibility of malicious content. The ML classifier strongly supports the malicious nature of this PDF.

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.com/pify?keyword=before+the+flood+student+worksheet+pdf
    • http://files.art-sparks.org/uploads/1/3/2/8/132814239/noratizuzatokufu.pdf
    • http://files.listeningforlove-poetryforscientists.com/uploads/1/3/1/4/131438098/06f02d10735.pdf
    • http://files.strawberryflats.com/uploads/1/3/2/7/132710795/lavibejepejiza_jorikinulap_wiboka.pdf
    • http://files.wastegyalstyles.com/uploads/1/3/1/8/131871816/6904686.pdf
    • http://files.cpsplantscapes.com/uploads/1/3/0/7/130739693/pezaneji_xogan.pdf
    • https://cdn.shopify.com/s/files/1/0432/8026/9462/files/gst_audit_checklist_in_word_format.pdf
    • https://cdn.shopify.com/s/files/1/0429/5039/4019/files/bernard_lewis_islam_in_history.pdf
    • https://cdn.shopify.com/s/files/1/0447/9139/8561/files/flying_without_wings_piano_sheet.pdf
    • https://cdn.shopify.com/s/files/1/0429/4891/9450/files/cours_de_francais_niveau_debutant.pdf
    • https://cdn.shopify.com/s/files/1/0431/2514/5760/files/nixuwozikef.pdf
    • https://cdn.shopify.com/s/files/1/0434/7772/9432/files/duwuvinusuzetafedelo.pdf
    • https://cdn.shopify.com/s/files/1/0434/2402/2680/files/outlook_365_won_t_open_attachments.pdf
    • https://cdn.shopify.com/s/files/1/0428/9147/7159/files/85316000788.pdf
    • https://cdn.shopify.com/s/files/1/0431/6263/2346/files/webikoza.pdf
    • https://cdn.shopify.com/s/files/1/0438/5013/7760/files/plural_form_of_deer.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_off0000b39b.bin
28a601fb3014765eff003c6b8f0774cf3445ef980ef406ec3df87464b0a7b716
pdf-font-stream PDF embedded font (sfnt) at offset 0xB39B 4956 bytes
font_01_sfnt_off0000c48b.bin
b2b724381c6285bd9ad99e76235c1377ff0efe91d5fec021bce785381d4c88a8
pdf-font-stream PDF embedded font (sfnt) at offset 0xC48B 15796 bytes
font_02_sfnt_off0000f551.bin
9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2
pdf-font-stream PDF embedded font (sfnt) at offset 0xF551 4324 bytes