Malicious PDF — malware analysis report

Static analysis result for SHA-256 f00355601f1441a9…

MALICIOUS

PDF

38.5 KB Created: 2020-08-08 21:37:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 85dd04c85ef76f4454a8f4a1f6d388d1 SHA-1: e26f9d071ba0aa69e9d80082e3fde014dd56bc5a SHA-256: f00355601f1441a98b2e29fa42c68c1f4d2b04be49f38117d1c9271c13e892b8
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to external resources. One critical heuristic indicates that the PDF links to known malicious redirector infrastructure, specifically 'https://ttraff.com/pify?keyword=oxford+phonics+world+2+teacher+s+book+pdf+free+download'. This suggests the document is designed to redirect users to malicious sites under the guise of providing a free download. The document body also contains the same URL, reinforcing the lure.

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.com/pify?keyword=oxford+phonics+world+2+teacher+s+book+pdf+free+download
    • http://files.alessandracassar.net/uploads/1/3/1/6/131606046/9161578.pdf
    • http://files.donkeycar.com/uploads/1/3/2/7/132741144/9c3630.pdf
    • http://voriko.aikenpsr.com/uploads/1/3/1/4/131453850/12317.pdf
    • https://cdn.shopify.com/s/files/1/0437/6307/3181/files/70820054828.pdf
    • https://cdn.shopify.com/s/files/1/0431/3271/5163/files/gepeworujilitekeniven.pdf
    • https://cdn.shopify.com/s/files/1/0431/9746/4731/files/54141602647.pdf
    • https://cdn.shopify.com/s/files/1/0431/0823/7473/files/hamari_adhuri_kahani_lyrics.pdf
    • https://cdn.shopify.com/s/files/1/0433/8620/8406/files/44621882686.pdf
    • https://cdn.shopify.com/s/files/1/0429/0864/7580/files/random_number_between_1_and_8.pdf
    • https://cdn.shopify.com/s/files/1/0431/0522/2822/files/gawuro.pdf
    • https://cdn.shopify.com/s/files/1/0431/4778/8450/files/45696551679.pdf
    • https://cdn.shopify.com/s/files/1/0433/1785/4373/files/sufujokotejopuxo.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/volobufepafolosovi.pdf
    • https://cdn.shopify.com/s/files/1/0431/4506/8699/files/canon_in_d_classical_guitar_sheet_music.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_off000049e9.bin
6243e03e7cfdd95475fc0dec755659ae6aa042e6f637ad5bf688a0a66ffb915e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x49E9 5556 bytes
font_01_sfnt_off00005cd3.bin
9b98979c58ba0ed8a8d1c8bf0b71075cb08be5082e4212d44f2cce43caf872cb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5CD3 10008 bytes
font_02_sfnt_off00007ef1.bin
a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7EF1 4324 bytes

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