Malicious PDF — malware analysis report

Static analysis result for SHA-256 792de0d9cff769bf…

MALICIOUS

PDF

41.9 KB Created: 2020-08-20 03:49:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 735913daf33e4d7e4a55490e027751ef SHA-1: 716e3ae6c8bb51247604e5330c118d1a34fd9721 SHA-256: 792de0d9cff769bf9812d6258fec6f14944285fffab2a0a2c0da2fee391d64f3
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, forming a link farm. One of these links, 'https://ttraff.cc/pify?keyword=avg+for+windows+xp+sp3', points to known malicious redirector infrastructure. The document body appears to be obfuscated or corrupted, preventing a clear understanding of its intended 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.cc/pify?keyword=avg+for+windows+xp+sp3
    • http://kosas.fullcirclepop.com/uploads/1/3/1/4/131406665/xakomebodopeme-muvinexita.pdf
    • http://wifomu.mariecostanzaphotos.com/uploads/1/3/1/6/131636725/8606360.pdf
    • http://files.athenasbyjoellen.com/uploads/1/3/1/3/131383426/gopewefunodofe.pdf
    • http://files.nationincorporated.com/uploads/1/3/1/4/131482884/6275895.pdf
    • https://cdn.shopify.com/s/files/1/0433/4868/9050/files/brain_on_fire_full_book.pdf
    • https://cdn.shopify.com/s/files/1/0430/6668/7642/files/49620718833.pdf
    • https://cdn.shopify.com/s/files/1/0432/3141/2379/files/rabuwebur.pdf
    • https://cdn.shopify.com/s/files/1/0429/7952/4759/files/norogekukisuvudep.pdf
    • https://cdn.shopify.com/s/files/1/0433/1218/5499/files/26358240915.pdf
    • https://cdn.shopify.com/s/files/1/0434/7694/3000/files/principles_of_biostatistics.pdf
    • https://cdn.shopify.com/s/files/1/0430/6223/1201/files/87200277540.pdf
    • https://cdn.shopify.com/s/files/1/0431/1256/2849/files/body_systems_worksheets.pdf
    • https://cdn.shopify.com/s/files/1/0434/1959/9004/files/widubodajunekibadasuki.pdf
    • https://cdn.shopify.com/s/files/1/0432/3246/0960/files/77562478983.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_off000056b0.bin
1883f967b3a1398b5c4fe2265aeccdddbd95d823b58604efcf56fd27121ec01b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x56B0 4932 bytes
font_01_sfnt_off00006795.bin
a3740ac163310a74dce3d179da572daf3414d9b4a1205183d7cb7537c7c17470		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6795 11744 bytes
font_02_sfnt_off00008cbb.bin
4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8CBB 4324 bytes

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