Malicious PDF — malware analysis report

Static analysis result for SHA-256 d20b082324f07fa7…

MALICIOUS

PDF

55.3 KB Created: 2020-08-19 17:42:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d3a789a769c19e774e70e8a222483498 SHA-1: 9ae9021fea71e59a4dc434dd37f8587eb1c86a54 SHA-256: d20b082324f07fa7ff48f65041d810b173ea76f3742db2041eac88bac72ebce8
152 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to suspicious domains or are part of a link farm designed to obscure malicious destinations. One critical heuristic identified a link to a known malicious redirector, ttraff.cc, which is likely intended to lead the user to a malicious payload. The document body, though partially corrupted, contains text related to 'bedsheet painting video' and the URLs, suggesting a lure to trick users into clicking through to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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=bedsheet+painting+video
    • http://files.pleasantbud.com/uploads/1/3/1/6/131607237/08d8e2.pdf
    • http://zunonu.val6heat.com/uploads/1/3/0/7/130775379/besezodi.pdf
    • http://files.frankhagancontracting.com/uploads/1/3/1/0/131071114/ef36443b.pdf
    • http://files.miamibeautyboutique.shop/uploads/1/3/1/1/131164152/7166052.pdf
    • https://cdn.shopify.com/s/files/1/0431/3448/4648/files/saab_bahadar_full_movie_720p.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/bararilisubolubudikolumo.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/faxusumowavunisipor.pdf
    • https://cdn.shopify.com/s/files/1/0438/7156/8040/files/86052045657.pdf
    • https://cdn.shopify.com/s/files/1/0430/1311/1961/files/16660803525.pdf
    • https://cdn.shopify.com/s/files/1/0437/2732/3301/files/android_4._4._2_delete_google_account.pdf
    • https://cdn.shopify.com/s/files/1/0429/4891/9450/files/ujyaalo_90_network.pdf
    • https://cdn.shopify.com/s/files/1/0432/6447/5304/files/95026443135.pdf
    • https://cdn.shopify.com/s/files/1/0430/6845/7122/files/terotijoteboxepijojuju.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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000061a1.bin
9998a09854ff3b57dda06f3c99466d1aa8e8f89aff1b2ce6bbc53c1306b867b9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x61A1 6024 bytes
font_01_sfnt_off00007646.bin
893eb8af89672974bca52466a480c394c038bf5a6f552eb09af25b6d81ed7d1b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7646 4988 bytes
font_02_sfnt_off0000873f.bin
8f37aa4ddecf7ea9b2dfc9b23026865945c382972a76d27afd35449cee107ed8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x873F 14232 bytes
font_03_sfnt_off0000b340.bin
d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB340 4324 bytes
font_04_sfnt_off0000c141.bin
149e59a7cb18fd55cb29c7e34377c33da52cc5a524881e751101a8679ce44aa8		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC141 3784 bytes

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