Malicious PDF — malware analysis report

Static analysis result for SHA-256 a1c58819523f47df…

MALICIOUS

PDF

55.3 KB Created: 2020-08-24 13:22:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6b82db2c78da7d428de9c794bd1f1db7 SHA-1: 1a587ebf196578d33cb7c3881962929bd66b13f7 SHA-256: a1c58819523f47dfc6652a819d5f09a8399e3948237f277dfb6e56d23575a00b
128 Risk Score

Malware Insights

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

The PDF file contains multiple embedded URLs, with one identified as a malicious redirector. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' indicates a direct link to malicious infrastructure. Additionally, the 'SE_URGENCY_LURE' heuristic suggests the document's content is designed to prompt immediate user action. The presence of a link farm ('PDF_SEO_LINK_FARM') further supports the malicious intent of distributing malicious content. No scripts were extracted from this sample.

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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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=central+line+infection+guidelines
    • http://files.galliltd.com/uploads/1/3/0/7/130776812/2517628.pdf
    • https://cdn.shopify.com/s/files/1/0440/4091/3061/files/90006331245.pdf
    • https://cdn.shopify.com/s/files/1/0435/2219/5607/files/xugeromofezonudesirivi.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/53567737566.pdf
    • https://cdn.shopify.com/s/files/1/0463/9578/5371/files/bittorrent_utorrent_free.pdf
    • https://cdn.shopify.com/s/files/1/0429/2388/4711/files/guwurumobesadavagoganij.pdf
    • https://cdn.shopify.com/s/files/1/0434/9027/9574/files/nebimozewasolifa.pdf
    • https://cdn.shopify.com/s/files/1/0438/1117/6610/files/digital_electronics_tutorial_point.pdf
    • https://cdn.shopify.com/s/files/1/0430/9198/4535/files/computer_books_download_free.pdf
    • https://cdn.shopify.com/s/files/1/0431/5326/0706/files/suvugafijovitikisapeje.pdf
    • https://cdn.shopify.com/s/files/1/0461/7161/9491/files/kaspersky_android_antivirus_activation_code_free.pdf
    • https://cdn.shopify.com/s/files/1/0428/2341/8019/files/modern_automotive_technology_6th_edition_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0430/6580/2903/files/75722392186.pdf
    • https://cdn.shopify.com/s/files/1/0429/6438/5951/files/50897206814.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_off000082f4.bin
d124d1675e390c1f357ea2959a013fab736c0a3822511f52082c2098b084201f
pdf-font-stream PDF embedded font (sfnt) at offset 0x82F4 5092 bytes
font_01_sfnt_off00009448.bin
9f934b7d5c7c427ca8c4d44146b489df36f0a6f321118cd929b0592a46b921db
pdf-font-stream PDF embedded font (sfnt) at offset 0x9448 14752 bytes
font_02_sfnt_off0000c27f.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3
pdf-font-stream PDF embedded font (sfnt) at offset 0xC27F 4324 bytes