Malicious PDF — malware analysis report

Static analysis result for SHA-256 3816e7c247c1fe6b…

MALICIOUS

PDF

50.1 KB Created: 2020-08-10 02:47:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4c4c97566a77ca0280332254cee0a520 SHA-1: 61d59c65be5b13bf420f86ddd9c20057630f007d SHA-256: 3816e7c247c1fe6b35ad59c608622eab513d6be0b8996098b6bc0816b1f0cb6e
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to a link farm hosted on Shopify. One of these links, https://ttraff.ru/pify?keyword=tropismes+nathalie+sarraute+pdf, is identified as a malicious redirector. The document body, though heavily obfuscated, also contains this URL, suggesting the primary intent is to redirect the user to malicious infrastructure. 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=tropismes+nathalie+sarraute+pdf
    • http://files.mauthouq.com/uploads/1/3/0/7/130738876/f24c90889dff7.pdf
    • http://files.therapoolsandspas.com.au/uploads/1/3/0/9/130969192/7342106.pdf
    • http://megefobef.oneplaceproject.com/uploads/1/3/0/7/130739777/9800063.pdf
    • http://megefobef.oneplaceproject.com/uploads/1/3/0/7/
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/23158701460.pdf
    • https://cdn.shopify.com/s/files/1/0432/2027/1259/files/41146030376.pdf
    • https://cdn.shopify.com/s/files/1/0430/2720/2205/files/alibaba_group_annual_report_2020.pdf
    • https://cdn.shopify.com/s/files/1/0430/7917/2257/files/gopugafuvovus.pdf
    • https://cdn.shopify.com/s/files/1/0428/8095/8617/files/8985485768.pdf
    • https://cdn.shopify.com/s/files/1/0431/9536/7585/files/negusonefurukiwaseduv.pdf
    • https://cdn.shopify.com/s/files/1/0428/4507/7671/files/bernardo_stamateas_libros_quiero_un_cambio.pdf
    • https://cdn.shopify.com/s/files/1/0429/2955/3575/files/favefibavesoke.pdf
    • https://cdn.shopify.com/s/files/1/0435/0954/7174/files/27031064375.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/2857609843.pdf
    • https://cdn.shopify.com/s/files/1/0440/7027/3174/files/36169064585.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/mirizopenifipometetotagoz.pdf
    • https://cdn.shopify.com/s/files/1/0435/7554/1919/files/gold_chain_design_catalogue.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_off00007291.bin
f79022b2c8edde751424506b6ebad56fdc9df0e30756c7e17e7a2b63137a3d2a
pdf-font-stream PDF embedded font (sfnt) at offset 0x7291 5112 bytes
font_01_sfnt_off000083bd.bin
9fea7705335ddd0f198ce70cedff3bccb44a2e96a3a4d4487fe8259ca61079ed
pdf-font-stream PDF embedded font (sfnt) at offset 0x83BD 12608 bytes
font_02_sfnt_off0000ab6b.bin
b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c
pdf-font-stream PDF embedded font (sfnt) at offset 0xAB6B 4324 bytes