Malicious PDF — malware analysis report

Static analysis result for SHA-256 d9a56abfe1673c35…

MALICIOUS

PDF

38.0 KB Created: 2020-08-18 17:31:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1cb3c7a264ca108d7e4d1ae02020f4b6 SHA-1: 2a09f88c28712d8e956b91be64203ac19f0759e7 SHA-256: d9a56abfe1673c35b1e500666a9b48fe3179addd9fd3aeb9ed87a6bf91d017e6
128 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs, with one identified as a malicious redirector. The document body, though heavily obfuscated, contains a reference to the malicious URL and a call-to-action phrase, suggesting a lure to trick users into clicking the link. The presence of a link farm further supports a malicious intent to distribute content or redirect users to malicious sites.

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.com/pify?keyword=new+assamese+language+video+song
    • http://files.tukawaysleddogkennel.com/uploads/1/3/2/7/132740277/73c41927b3edc58.pdf
    • http://files.transmundanepress.com/uploads/1/3/2/7/132740836/5664439.pdf
    • https://cdn.shopify.com/s/files/1/0435/5588/1111/files/33934489068.pdf
    • https://cdn.shopify.com/s/files/1/0440/3298/3205/files/tapokefiwit.pdf
    • https://cdn.shopify.com/s/files/1/0431/2242/6013/files/6255926563.pdf
    • https://cdn.shopify.com/s/files/1/0430/7219/2669/files/84238245855.pdf
    • https://cdn.shopify.com/s/files/1/0431/1724/8672/files/26808223081.pdf
    • https://cdn.shopify.com/s/files/1/0430/3942/4669/files/koguvivefezelizo.pdf
    • https://cdn.shopify.com/s/files/1/0434/1104/6556/files/apprendre_les_fournitures_scolaires_en_francais.pdf
    • https://cdn.shopify.com/s/files/1/0438/0796/5345/files/gasixopevopole.pdf
    • https://cdn.shopify.com/s/files/1/0429/6422/2101/files/gta_5_online_mods_xbox_360.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_off00004c18.bin
515960674b85a7bb557af39bf04e1ed73bea55bd57d5b808491ddac69c35d7aa		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4C18 4972 bytes
font_01_sfnt_off00005cfb.bin
925c0ff01761f1e0a5f1058f1959ede970259ac8feba7f4ad7a033fad568e98d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5CFB 9440 bytes
font_02_sfnt_off00007d41.bin
0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7D41 4324 bytes

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