Malicious PDF — malware analysis report

Static analysis result for SHA-256 e3b4c1cbdb221ac5…

MALICIOUS

PDF

54.9 KB Created: 2020-08-08 00:20:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ce1db31ec75bec1270662bd1abcf6775 SHA-1: b36d48f9e5e176433b0cf4c4cdaa29a6bba7cacc SHA-256: e3b4c1cbdb221ac509f624626810f0c703fc4b2dde5aa88e66ede467cc172110
152 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, including one that redirects to a malicious domain (ttraff.cc) disguised as a syllabus. This indicates a phishing or redirection attempt to deliver further malicious content. The ML classifier strongly supports the malicious nature of this PDF.

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=mathematics+optional+syllabus+pdf
    • http://mexixisod.pamelafindleton.com/uploads/1/3/2/6/132696030/127530.pdf
    • http://files.meanttobestitchin.shop/uploads/1/3/1/4/131407767/jojobuxu_gutojef_fizojidof.pdf
    • http://files.derbyguitartuition.co.uk/uploads/1/3/0/8/130874457/momojipuzapine.pdf
    • http://files.create-diy-online.com/uploads/1/3/0/7/130775102/2742125.pdf
    • http://zeropofil.12chemistry.com/uploads/1/3/2/6/132681579/72d3cc3fe289.pdf
    • https://cdn.shopify.com/s/files/1/0432/7643/5621/files/15510802396.pdf
    • https://cdn.shopify.com/s/files/1/0431/6400/8610/files/pusemomabatovekeman.pdf
    • https://cdn.shopify.com/s/files/1/0436/7430/4662/files/11655300088.pdf
    • https://cdn.shopify.com/s/files/1/0431/8360/3876/files/65552008446.pdf
    • https://cdn.shopify.com/s/files/1/0438/8149/6744/files/bopugepewetopimawi.pdf
    • https://cdn.shopify.com/s/files/1/0438/6127/8870/files/77988751233.pdf
    • https://cdn.shopify.com/s/files/1/0433/9580/9431/files/sekevupu.pdf
    • https://cdn.shopify.com/s/files/1/0431/6299/2795/files/10976743502.pdf
    • https://cdn.shopify.com/s/files/1/0427/8904/4383/files/45093985494.pdf
    • https://cdn.shopify.com/s/files/1/0430/2739/8807/files/69216707140.pdf
    • https://cdn.shopify.com/s/files/1/0431/1796/9570/files/nokavaxeg.pdf
    • https://cdn.shopify.com/s/files/1/0432/6971/8182/files/minecraft_0._14_1_apk.pdf
    • https://cdn.shopify.com/s/files/1/0429/9456/5271/files/wonuwe.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000790e.bin
361a5ec0a2b723e00894185019270379cf94c6e02ec3b76b7f063d67b2f6cfc1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x790E 5544 bytes
font_01_sfnt_off00008bd3.bin
5e067315a2bd9524b6254977960f062bb129990ed69868068e29b4596197f3c8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8BD3 2320 bytes
font_02_sfnt_off00009625.bin
2b758a9e1f00c3551010f4a0fd6dc5d55d4770e1b4e7372a25e8941808f4d963		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9625 9824 bytes
font_03_sfnt_off0000b7f1.bin
a349519ccbdbca3d75704c2becf615ab37801eb1543272228454131dceb83acc		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB7F1 16224 bytes

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