Malicious PDF — malware analysis report

Static analysis result for SHA-256 a0b84adcc1ee1c0a…

MALICIOUS

PDF

38.9 KB Created: 2020-08-06 21:52:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 36c8c9c539f57116862577531e543b0d SHA-1: e1a3a43925c9be818e4b5623fee2abe4469c1d65 SHA-256: a0b84adcc1ee1c0a55b7d1495225d44d659172a7cb18b8094916526de7b9bf90
128 Risk Score

Malware Insights

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

The PDF contains a "call-to-action" phrase and multiple embedded URLs, including one identified as a malicious redirector. The primary malicious URL, https://ttraff.ru/pify?keyword=english+to+gujarati+dictionary+free+download+pdf+file, is presented as a download link for a dictionary, likely a lure to trick users into visiting a malicious site. The document also hosts a large number of links to other PDFs, suggesting a link farm or SEO poisoning tactic.

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=english+to+gujarati+dictionary+free+download+pdf+file
    • http://files.elohims.org/uploads/1/3/2/6/132696263/divav.pdf
    • http://files.simplybreezyphotography.com/uploads/1/3/0/8/130874115/lebagifami.pdf
    • http://files.samanthaamatoportfolio.com/uploads/1/3/0/7/130738792/ff795e7197291.pdf
    • http://files.streetfightersunitedkingdom.com/uploads/1/3/0/8/130874064/2331943.pdf
    • http://files.gskubitz.com/uploads/1/3/1/4/131437363/bijuwufe.pdf
    • https://cdn.shopify.com/s/files/1/0434/0924/4316/files/xobemesumerowozululural.pdf
    • https://cdn.shopify.com/s/files/1/0433/9780/8285/files/figufu.pdf
    • https://cdn.shopify.com/s/files/1/0429/8535/7463/files/jedizad.pdf
    • https://cdn.shopify.com/s/files/1/0429/8804/4442/files/423234735.pdf
    • https://cdn.shopify.com/s/files/1/0433/6500/7509/files/volide.pdf
    • https://cdn.shopify.com/s/files/1/0437/0602/4101/files/bash_command_cheat_sheet.pdf
    • https://cdn.shopify.com/s/files/1/0428/5346/6271/files/takotuvupi.pdf
    • https://cdn.shopify.com/s/files/1/0429/5553/8595/files/pokemon_gold_online.pdf
    • https://cdn.shopify.com/s/files/1/0429/4760/8730/files/vavisabatexerejexanuromen.pdf
    • https://cdn.shopify.com/s/files/1/0429/2860/3295/files/56693763580.pdf
    • https://cdn.shopify.com/s/files/1/0434/5279/2982/files/69594763642.pdf
    • https://cdn.shopify.com/s/files/1/0429/5560/4121/files/numbers_worksheets_11_20_pdf.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_off000056f1.bin
146dce4d5b20ede11628b3cb71f1afa4351c51c9f66136092c03744dd2b64118
pdf-font-stream PDF embedded font (sfnt) at offset 0x56F1 5644 bytes
font_01_sfnt_off00006a47.bin
189566c37c44bc6ffc2feee0f338dc06ad24c626130ae983a76cb14d7b21ac7e
pdf-font-stream PDF embedded font (sfnt) at offset 0x6A47 10564 bytes