Malicious PDF — malware analysis report

Static analysis result for SHA-256 6737a31851c960d0…

MALICIOUS

PDF

42.5 KB Created: 2020-08-03 07:41:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 816a7357ecdc1fba756fb894768b1075 SHA-1: c9450475f8467ffd2868211879fffb2ede6f9f8d SHA-256: 6737a31851c960d0f4abd601880db2187ccf6d219da1246d75c2f0c1dec53b04
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document contains a large number of embedded links, identified as a PDF link farm, pointing to various PDF files hosted on Shopify and other domains. One of the primary links, https://ttraff.cc/pify?keyword=left+right+center+game, is flagged as a known malicious redirector. The document's structure and the presence of a malicious redirector suggest an attempt to direct users to potentially harmful content, possibly for SEO manipulation or to host further malicious payloads.

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=left+right+center+game
    • http://files.hkyours.ca/uploads/1/3/1/4/131437878/mavobivoved.pdf
    • http://files.fredachaneyliteraryscout.com/uploads/1/3/2/7/132740536/97c64cdd1f.pdf
    • http://files.spinclass.org/uploads/1/3/0/8/130874110/10f12c.pdf
    • http://files.ejacts.com/uploads/1/3/1/3/131384018/givebivusunilujogoj.pdf
    • http://files.urbansoundstudio.com/uploads/1/3/1/4/131483149/5341926.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/0799/1208/files/how_to_teleport_players_in_minecraft.pdf
    • https://cdn.shopify.com/s/files/1/0428/1607/7991/files/33113218210.pdf
    • https://cdn.shopify.com/s/files/1/0430/5561/2058/files/fizokuvel.pdf
    • https://cdn.shopify.com/s/files/1/0433/6893/9672/files/48481737524.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/mupesoxozuwimufuvijolus.pdf
    • https://cdn.shopify.com/s/files/1/0434/1376/6293/files/88795764977.pdf
    • https://cdn.shopify.com/s/files/1/0428/3708/2271/files/17169203143.pdf
    • https://cdn.shopify.com/s/files/1/0431/5470/2496/files/11884742088.pdf
    • https://cdn.shopify.com/s/files/1/0428/8941/2767/files/7088987516.pdf
    • https://cdn.shopify.com/s/files/1/0435/8252/1512/files/35861771225.pdf
    • https://cdn.shopify.com/s/files/1/0437/7100/3037/files/65048298279.pdf
    • https://cdn.shopify.com/s/files/1/0430/3942/4665/files/dubotuzarodabumajizixebe.pdf
    • https://cdn.shopify.com/s/files/1/0438/6599/7472/files/lorawiwonunepasavo.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006a9b.bin
6809c841daff91b6b562341f6f60bec79f33d18464f63f2543599e77af72f407		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6A9B 5024 bytes
font_01_sfnt_off00007b96.bin
789c2c9ff6082ad1b518713696b65cbad86c5af3ba76ecd28191042b328645cd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7B96 9740 bytes

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