Malicious PDF — malware analysis report

Static analysis result for SHA-256 1cfe7dac2d57ca49…

MALICIOUS

PDF

39.7 KB Created: 2020-08-14 08:49:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6d6d241ca3d1230bbf4ddfab764c32d9 SHA-1: d862ef608656a83c7f50ea6f78bd6ea699093178 SHA-256: 1cfe7dac2d57ca497b7b7dd48b06f68f91014066e0fe72ec9817e98380fce44f
120 Risk Score

Malware Insights

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

The PDF document contains a large number of embedded links, forming a link farm, with one of these links directing to a known malicious redirector. The document body is heavily obfuscated and contains what appears to be junk data along with a URL. No scripts were extracted from this sample. The primary attack vector appears to be directing users to malicious infrastructure via embedded links.

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=fly+fishing+guides+in+broken+bow+oklahoma
    • http://files.nixageneralbaptist.com/uploads/1/3/0/9/130969461/abda9fa24b.pdf
    • http://buxaver.meganrielmehan.com/uploads/1/3/1/4/131454165/722619.pdf
    • http://tiwixal.shine-bright-centre.co.nz/uploads/1/3/1/4/131406893/setusuv_jajid_buduna.pdf
    • http://files.ajsherwood.com/uploads/1/3/2/7/132741029/8587149.pdf
    • http://felifurez.bling45.shop/uploads/1/3/2/7/132740720/fibafiz_nifinidopo_xorilabi_ropubusalikosuj.pdf
    • https://cdn.shopify.com/s/files/1/0435/5116/2517/files/90849093237.pdf
    • https://cdn.shopify.com/s/files/1/0431/5843/8039/files/fiwokegedaribelivamobavon.pdf
    • https://cdn.shopify.com/s/files/1/0431/6191/1458/files/hunter_x_core_sprinkler_system_manual.pdf
    • https://cdn.shopify.com/s/files/1/0432/2885/6477/files/ragowuka.pdf
    • https://cdn.shopify.com/s/files/1/0437/1854/1480/files/mental_capacity_assessment.pdf
    • https://cdn.shopify.com/s/files/1/0432/9239/3640/files/10th_english_synonyms_and_antonyms_list.pdf
    • https://cdn.shopify.com/s/files/1/0428/9105/1161/files/gerisaliparidijopez.pdf
    • https://cdn.shopify.com/s/files/1/0437/5055/5799/files/usa_charachter_arcade.pdf
    • https://cdn.shopify.com/s/files/1/0431/9117/3282/files/french_to_english_translator.pdf
    • https://cdn.shopify.com/s/files/1/0434/6878/3766/files/xokawadokoruw.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_off00005a65.bin
9eadc9788dceff14f6dc88dc8ad1b6e6d5e831b2eda22670f132b4ba56a6c4c2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5A65 5672 bytes
font_01_sfnt_off00006d9c.bin
195060ae2225a27fa03dff7ea0861a0549aa3e8e4fb838c08219cfb73be8006b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6D9C 10504 bytes

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