Malicious PDF — malware analysis report

Static analysis result for SHA-256 1cdbd186e5a71efc…

MALICIOUS

PDF

42.8 KB Created: 2020-08-18 21:23:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: caa0023538ac31f18022d7a1c292535a SHA-1: 69d7183e070cba84c5d48956b22acbe0c8512664 SHA-256: 1cdbd186e5a71efc4b2f20e7466363dd404d27275f192f8a2220e81e66b32403
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link T1059.001 PowerShell

The PDF contains embedded links that redirect to a malicious domain, specifically advertising a 'Fnaf mod for minecraft pe android'. The primary malicious link is to 'ttraff.com', which is flagged as a known malicious redirector. The document body, though heavily obfuscated, contains the same lure text and URL. The presence of numerous Shopify-hosted PDF links suggests a link farm for SEO poisoning, further indicating a malicious intent to drive traffic to malicious sites.

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.com/pify?keyword=fnaf+mod+for+minecraft+pe+android
    • http://javovo.provenpurpose.net/uploads/1/3/1/4/131438563/gisizudemajepojoko.pdf
    • https://cdn.shopify.com/s/files/1/0428/9658/8967/files/lituxofe.pdf
    • https://cdn.shopify.com/s/files/1/0440/2089/1798/files/lodokubomivir.pdf
    • https://cdn.shopify.com/s/files/1/0435/0178/1156/files/git_update_branch_with_master.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/jokopewizemaw.pdf
    • https://cdn.shopify.com/s/files/1/0427/9474/6023/files/vujanafopujog.pdf
    • https://cdn.shopify.com/s/files/1/0428/8462/8633/files/28636253899.pdf
    • https://cdn.shopify.com/s/files/1/0436/0264/1059/files/7277927257.pdf
    • https://cdn.shopify.com/s/files/1/0432/2010/7424/files/54153827004.pdf
    • https://cdn.shopify.com/s/files/1/0432/0333/0209/files/aprender_ingles_para_nios_de_3_a_5_aos.pdf
    • https://cdn.shopify.com/s/files/1/0436/4835/2406/files/99744733855.pdf
    • https://cdn.shopify.com/s/files/1/0433/9456/4252/files/prepspotlight_tv_mshsl.pdf
    • https://cdn.shopify.com/s/files/1/0431/5496/4637/files/26740215355.pdf
    • https://cdn.shopify.com/s/files/1/0436/2534/9273/files/111760277.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_off00005e82.bin
4c4d7f5cafac125a360e38ab5db45085d2e44b119e5263b958db662a89f6cf69		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5E82 4832 bytes
font_01_sfnt_off00006ece.bin
bebc7af38dca3095339a8adec0914653e2b1fe0860bc3cb123008af7c2f261ff		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6ECE 9820 bytes
font_02_sfnt_off0000904c.bin
d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378		 pdf-font-stream PDF embedded font (sfnt) at offset 0x904C 4324 bytes

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